#Remember that you need a valid gateway IPunless the Asterisk server is on the same subnet and LAN
Set Valid Gateway IP (if you don't have one already)
ip route 0.0.0.0 0.0.0.0 GATEWAYIP
Enable VOIPTrust
voice service voip
ip address trusted list
ipv4 0.0.0.0 0.0.0.0
sip
Set Credentials For Asterisk and Register To Asterisk
sip-ua........
Since newer versions of Ubuntu like 20, you will find there is no longer dynagen and that the dynamips provided is faulty and will segfault each time:
Cisco Router Simulation Platform (version 0.2.14-amd64/Linux stable)
Copyright (c) 2005-2011 Christophe Fillot.
Build date: Apr 3 2018 12:20:29
Local UUID: 3c1c0b7f-2fab-4fda-b40b-74841d1bcfe0
Instance ID set to 1.
netio_tap_create: unable to open TAP device tap1 (No such fi........
Uses:
Install OS on physical drive
Linux installation VMware
Install Windows on physical drive
Boot OS from physical drive
VMware Workstation tutorial
Linux virtual machine to physical disk
Windows to Linux migration
Dual boot OS installation
Boot from external SSD
Linux, Windows, BSD installation guide
Physical drive boot OS........
yum update
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the onl........
In a lot of distros, vdpau which accelerates video through the GPUis often not installed even in recent distros. This will result in Firefox with Youtube dropping frames when you check the "Stats for Nerds" and to the eye as jerky or slower video playback due to the dropped frames.
Some sites will say that because you are watching VP09 that there is no GPU support, but with vdpau installed and enabled, many GPUs will still be able to use hardware decoding for 4K........
This is certainly a poor design, as you can read many seasoned admins who have updated their iDRAC only to have it killed. One possible cause is not by doing all the incremental updates, doing updates from an old iDRAC to one many revisions newer is a sure way to kill things, but even then there is no guarantee based on the amount of failures.
List of threads of people's dead iDRAC's:........
This guide assumes you have a working Postfix server and want it to sign with DKIM.
There are a few things we have to understand to make all of this work though, which require you to be familiar with DNS as well.
1.) Install OpenDKIM
apt install opendkim
systemctl enable opendkim
2.) Edit /etc/opendkim.conf
Syslog yes
SyslogSuccess yes
Mode&nbs........
apt install tftpd-hpa
#change TFTP_ADDRESS to by setting address to 192.168.1.1:69 or the IP you need, otherwise it will listen on all IPs and interfaces which could be a security risk.
# edit /etc/default/tftpd-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/srv/tftp"
TFTP_ADDRESS="192.168.1.1:69"
TFTP_OPTIONS="--secure"........
This sometimes happens when trying to install the EFIversion of grub to a device when you are booted into Legacy/MBR mode. It doesn't seem to occur on all machines, but some and seems somewhat BIOS dependent.
grub-install --target=x86_64-efi /dev/sda
Installing for x86_64-efi platform.
grub-install.real: warning: Couldn't find physical volume `(null)'. Some modules may be missing from core image..
grub-install.real: warning: Couldn't find physica........
This can break things easily in remove environments where it was normally easy to convert a normal eth0 to a bridge under br0, and that bridge would normally have the same MAC address by default, which is desirable for most situations.
In Debian 11 this is different for some reason now.
https://unix.stackexchange.com/questions/681013/bridge-gets-random-mac-........
Assign way more replicas than you have of memory on all nodes and watch the Swarm crash which can easily reproduce in a small VMfor testing.
root@Deb11Docker01:~# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAM........
You can do a static lease that is tied to the MAC address but what a lot of users prefer is that they come into the office or lab the next day and that their device gets assigned the same IP address (if possible).
As we can see in the dhcpd logs that there is threshold that is defaulted as we'll show later. Whatever the threshold is set at, if the lease is younger than the threshold, it will keep the same lease. In other words, if the device goes to sleep or is powered off........
This seems to happen in many different drivers but it happened more often in newer versions such as 530 vs 525.
Then nvidia-modeset goes to 100%
There are many reports of this appearing since driver 4.70 and I can confirm I've seen this in various machines.
https://forums.de........
Even today we see a lot of servers that have different services and ports open for rpc and this creates not only potential inward vulnerabilities but perhaps more common, the abuse of your network resources in reflective rpc queries.
To stop this problem, you should disable and remove all services relating to rpc or at least block all relevant ports for the service.
Surprisingly, there are still some providers and OS installs in Linux that install these services and leave them........
You start a qemu like this and another VM already started with the same .iso
qemu-system-x86_64 -enable-kvm -m 4096 -cdrom some.iso
But you get this error:
qemu-system-x86_64: Initialization of device ide-hd failed: Failed to get "write" lock
Is another process using the image [some.iso]?
It's odd because the -cdrom by default is read-only and qemu should not want or care about getting write lock on........
Are you getting this error when trying to connect to a site/domain/service and then you checked your router/nameserver's logs to see what's wrong?
You may see something like this:
named[3025898]: REFUSED unexpected RCODE resolving
This is not usually an error with named or bind, at least not on your end but NORMALLY this is an issue with the remote nameserver.
A lot of times this is a misconfigured remote nameserver. A classi........
Some people find it less than intuitive to do on DNSMasq and by default DNSMasq is available on 0.0.0.0 which could even be your LAN or Public IP.
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp ........
A lot of companies are unsure which solution to choose and many may not be aware of Docker Swarm as an alternative to Kubernetes. One thing that many Sysadmins find is that Docker Swarm is simply easier, quicker to setup and maintain by far than Kubernetes.........
First we need a few extra packages:
apt update
apt install -y adduser libfontconfig1 musl sudo
wget https://dl.grafana.com/enterprise/release/grafana-enterprise_10.3.1_amd64.deb
Install / Enable Grafana
dpkg -i grafana-enterprise_10.3.1_amd64.deb
dpkg -i grafana-enterprise_10.3.1_amd64.deb
(Reading database ... 44309 files and directories currently installed.)
Preparin........
This is for the situation that you're doing other things that may conflict or have your own custom rules and ufw keeps overriding iptables.
A lot of guides don't work, and even ufw reset does not work, because it still leaves the old ufw chains.
Here is what works to disable ufw completely
systemctl stop ufw
systemctl disable ufw
ufw disable
rm -f /et........
You are probably using some custom image or maybe this is some sort of container that didn't boot with systemd.
The solution is to use "reboot -f"
reboot -f
This will force the system/OS/VM/container to reboot.........
Normally syntax highlighting is the default behavior.
You can enable it manually by hitting :syntax on
But normally you'll have this error because of the missing package.
E319: Sorry, the command is not available in this version
Solution install the vim-gui-common package:
apt install vim-gui-common
After that you should find that the code is highli........
find /usr/share/zoneinfo/|sed s#"/usr/share/zoneinfo/"##g|grep "/"|grep -v posix|grep -v ^"Etc/"|grep -v ^right|grep -v ^"SystemV"
Africa/Addis_Ababa
Africa/Abidjan
Africa/Blantyre
Africa/Lusaka
Africa/Casablanca
Africa/Libreville
Africa/Asmara
Africa/Bujumbura
Africa/Dakar
Africa/Lagos
Africa/Malabo
Africa/Harare
Africa/Kigali........
configure.ac:75: error: possibly undefined macro: AC_PROG_LIBTOOL
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1
make: *** [/software/pixman/configure] Error 1
make: *** Deleting file `/software/pixman/configure'
yum install libtool........
Step 1.) Upgrade to Debian 11 first
The process to go to Debian 12 is not as smooth as 11, when trying to upgrade from Debian 10. In fact, it doesn't work directly, so you'll first need to follow this guide to update to Debian 11, reboot and come back here if successful.
Step 2.) Update sources.list
Update your /etc/apt/sources.list like this:
deb http://........
If you have swarm services and dockerd is creating a high load even with the containers just being idle, the easiest solution is to upgrade to a newer docker version.
For example an identical config of 3 nodes, with Redis 5 with 30 replicas produces a load of about 1.45 in Debian 10 with Docker18.09.1
If I create the same setup on Debian 11, with Docker 20.10.5+dfsg1 then the CPU usage is low.
One other difference I wondered is the kernel. In my test setup........
We used a simple Debian 10 VM and showed the memory before starting docker and with no docker containers being started. The goal is to show much much memory dockerd actually uses.
Before docker was started
The VMwas using 58M of RAM.
After docker was started
it was using 99MB of RAM.
How much RAM does docker use?
It's not scientific but fair to say dockerd itself uses about 41MB of RAM (99-58).........
If you get this error, it is often because you have configured Apache with modules that weren't actually installed. Eg. you try to load the PHPmodule but didn't actually install the apache2 php module, so the server can't start. In general, this error can often be caused by issues with problematic modules and/or Apache being configured for modules that have not actually be installed (eg. libapache2-mod-php) is missing.
The above results in this less than obv........
The issue is that Docker images are stripped down, so many tools and even python3 is missing, so you'll have to build or update the actual image yourself.
I assume you have started an image with something like this and that you have the Nvidia Toolkit installed (assuming you are using GPUs). If you're not using nvidia just remove --runtime=nvidia --gpus all.
docker run -it --runtime=nvidia --gpus all ubuntu bash
These works for most images li........
Welcome to our in-depth guide on configuring NVIDIA GPUs with Docker on Ubuntu. This post is tailored for developers, data scientists, and IT professionals who are looking to leverage the power of NVIDIA's GPU acceleration within Docker containers.
Whether you're working on machine lea........
You'll notice that /etc/resolv.conf contains dire warners on most Linux Desktops.
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use........
This does not seem to be officially documented but makes sense that an overlay on an overlay does not work and is considered an unsupported filesystem as is even NTFS . Some admins/organizations try to use ecyptfs as a simple solution to encrypt the contents of Docker. Instead, you could probably........
Just in case, it is reocmmended to backup the original contents of the directory (especially your home dir) before proceeding.
Setup ecryptfs
Run this command: ecryptfs-setup-private
It will ask you for your login password, this is so that when you login, everything is automatically decrypted by using a passphrase that is wrapped with your login.
You can hit enter and leave things blank for an autogenerated passphrase (for mounting) or you can en........
By default in most newer Windows installs, you will not be able to download files from "Internet" sites and you'll get this error "Your security settings do not allow for this file to be downloaded."
Solution to Enable Downloads in IE Internet Explorer
1.) Go to Settings (button) -> Internet options -> Security (tab)
2.) Click "Internet" and then the "Custom Level" button.
3.) Find the following section and set D........
How to check what kernel version you have/currently running?
uname -rm
5.4.0-91-generic x86_64
The above shows us that we are running 5.4.0-91-generic on the x86_64 architecture.
The safest way is to stick with the same flavor eg if you're on generic, and say on kernel 5.4.0 then it makes sense to follow what is below. However, if you are migrating or dual booting between newer hardware (eg. you got a........
The passwords are stored in the following locations on Unix/Linux:
The directory is usually inside your home like this:
~/.mozilla/firefox
logins.json contains the locations, username and password
key*.db (usually then name could be key3.db or key4.db)
Without the key file you will not see any passwords in Firefox as it is required to in order to decrypt the contents of logins.json........
We could always disable swap but this would normally be a bad idea unless you have an incredible amount of RAM and a workload that will never exceed it. However, for live/containerized and high performance environments it could be desirable.
Another middle ground may be to set swappiness to a lower number.
You may also want to clear your kernel's cache, which could be eating up RAM unnecessarily by c........
request_module: runaway loop modprobe binfmt-464c Kernel panic - not syncing: No init found Pid: 1, comm: swapper/0 Not tainted
This is usually caused by a mismatch in architecture and happens frequently in development environments.
Here is a example of what caused this issue:
Your binaries are based on one architecture
Your kernel was compiled with another architecture.
Why does this happe........
By default if you create a private key for SSH, it will create something like .ssh/id_rsa
Linux will always search for and offer this key when connecting to servers.
If you put extra keys in your .ssh directory like id_rsa_realtechtalk.com, they will be ignored by default and NOT used or offered (you can verify this with ssh -v) and see it is not being offered.
Here is how you add the extra SSH keys so they are all offered:
#this gives........
In a lot of distros like Debian, ecryptfs will mount itself in /home/yourusername/Private
This is controlled by Private.mnt which may contain the mount path like this:
/home/yourusername/Private
Change the default mount location of ecryptfs by modifying this file:
home/.ecryptfs/yourusername/.ecryptfs/Private.mnt
After you unmount and relogin, you should find ecryptfs is now mo........
A lot of developers want to go to 3.11 because of the speed improvements, but most distros never have the latest Python version.
Using the deadsnakes third party repo is the easiest way aside from compiling it yourself (which is safer and recommended):
Step 1 - Add the repo
apt-add-repository ppa:deadsnakes/ppa
If you get an error about requests then install it:........
Install exiftool:
apt install exiftool
Remove the metadata from "thefile.pdf":
exiftool -all= thefile.pdf
Warning: [minor] ExifTool PDF edits are reversible. Deleted tags may be recovered! - thefile.pdf
1 image files updated
Metadata, in the context of PDFs, refers to a set of data that describes and gives informat........
haproxy is one of the best known and widely used Open Source load balancers out there and a strong competitor to nginx.
haproxy is used by many large sites per Wikipedia:
HAProxy is used by a number of high-profile websites including GoDaddy, GitHub,........
If you are installing ta-lib for Python and get this error then you can normally solve it by manually getting the ta-lib source files and compiling.
tar -zxvf ta-lib-0.4.0-src.tar.gz
cd ta-lib;./configure;make;make install
Collecting ta-lib
Downloading https://files.pythonhosted.org/packages/39/6f/6acaee2eac6afb2cc6a2adcb294080577f9983fbd2726395b9047c4e13ec/TA-Lib-0.4.26.tar.gz (272kB)
&nbs........
Be very careful about what filename you specify in dhcpd.conf if you get an error like this:
NBP filesize is 0 Bytes PXE-E23:Client received TFTP error from server.
If you specify "BOOTx64.efi" then the file had better not be called "BOOTx64.EFI" as it is case sensitive. It's really a case of th........
1 - Install Vagrant
apt install vagrant
Make sure you have a supported Virtualization tool like Virtualbox or VMWare, Hyper-V etc.. It automatically detects and uses what you have. Virtualbox has a lot of support here with tons of images.
2 - Init Vagrant
We'll init to have a Debian 10 box by default to show how quick and easy it is.
vagrant init generic/debian10........
This seems to have changed for RHEL 8 where a normal dracut to update your initramfs creates a system that only boots for the running kernel. For example if you have Kernel 5 and then chroot into a RHEL 8 variant which uses kernel 4.18, and run dracut, it seems that by default the system will be unbootable.
It is also the case that if you move your RAID array or drives to another server that it will be unbootable, because dracut seems to only include modules needed for the curre........
Virtualbox is a very powerful tool, but for some use cases it is less than optimal.
Say you are in a work, lab or other environment where you are not alone on the physical network and there could be overlap of IPs, but you need all of your VMs to be contactable from your host, VMs need to communicate with each other, and VMs need internet.
NAT Network will give you VM to VM communication and internet, however, it is buggy and unstable. It also doesn't allow host to VM co........
You can read lots of posts about this issue but there is not much information about why this is the case or how grub determines the root= device name. Some even suggest modifying grub.cfg manually which is a disaster as the next kernel update will cause grub to revert back to the device name.
For most people this won't be an issue but those using template system, automated deployments and working in embedded may run into this issue with custom embedded and created minimal kernel........
Here is an easy way to restore things if you have the starting point and size of each partition using fdisk:
In this example we pretend that /dev/sda was wiped out, but the running system still has the info in /sys/class/block/sda
Go into each partition and record the "start" and "size"
hostdev@box /sys/class/block/sda/sda1 $ cat start
2048
hostdev@box /sys/class/block/sda/sd........
This can be a real pain when automating things and you do an apt install and some packages ask a lot of questions.
Make sure you set this variable when running:
DEBIAN_FRONTEND=noninteractive
Remember as well that if chrooting you will want to run like this:
DEBIAN_FRONTEND=noninteractive apt install -y yourpackagename
........
Have you checked your router/firewall logs and disconcertingly see connections to an unknown IP207.246.119.209:3478 from your Grandstream VOIPphones?
You're not alone and the Grandstream forums have discussed this issue.
However, even their own staff d........
So say you happen to have 2 NICs of the exact same chipset, they will generally show up as the same name, with possibly a different revision in lspci. Normally this is not an issue if you have a server with 4 NICs, generally the eth0 to eth3 appears from left to the right (or right to left on some vendors) so it doesn't take much figuring out.
Generally if you have different chipsets for different NICs, it should be easy to know which one is eth0 or the first NIC in the OS.........
Are you new to the company, datacenter or a third party who is responsible for deploying a fleet of servers from scratch.
The first step is to normally login to the KVM so you can perhaps manually reinstall, PXE boot the Cloud Image or reimage/reinstall an OS but you need access to the KVM/IP or what Dell calls iDRAC.
It's common that you may have forgotten this information or that another employee or colleague has changed the info and did not tell you, that they have left the........
This is an ongoing issue even with the latest Thunderbird 102.x where attachments downloaded via IMAP just won't save or will be corrupt which is a huge interruption to workflow or if you come back later to find out the file you thought you saved is invalid/corrupt and you have perhaps deleted the e-mail.
How to solve the Thunderbird filesize attachment issue?
1. Click on "Settings". then go to "General".
2. Scroll to the bottom to find "Conf........
If you are converting a generic wifi IP camera to ethernet, it may not be that simple as many are default hard coded to a static IP of 192.168.1.168 and login info admin/admin.
From there you can login to the camera and assign it to DHCP by going to http://192.168.1.168
For security these cameras +DVR should be on a separate untagged VLAN or if possible a physically isolated non-internet connected switch/network.
The reference below is applicable to many of the r........
Sometimes due to your BIOS/EFI you may find that you have chosen "Energy Efficient" for your CPU which may effectively disable turbo mode. This is because "Energy Efficient" will often restrict or throttle your CPU to the base speed. This can impact nearly any CPU such as Intel's, AMDs, Opteron, Xeon etc...
This is of course frustrating, for example if you have a CPU that is 2.0GHz base speed but turbo to 2.5GHz, you will never hit more than 2GHz.........
Docker adds iptables rules that break a lot of things including MASQUERADE or anything that needs the FORWARD table. If NAT is not working after Docker installation, it is probably because it set the iptables FORWARD policy to DROP.
This may also make you think that your br0 or bridge is not working, but it's likely just due to what we'll mention later on below, that, Docker probably set your FORWARD chain to default DROP all packets, so nothing on your bridge ever makes it out........
By default it uses raw .avi which takes a lot of space and will not play on a lot of systems.
It's best to change the codec to something like MP4.
Step 1.) File -> Preferences -> Screencast in Kazam
Step 2. ) Change Record With: to H264 (MP4)
After that you'll........
Solution for python pip3 not working anymore
from pip._internal.cli.main import main
File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
wget https://bootstrap.pypa.io/pip/3.5/get-pip.py
python3 get-pip.py
DEPRECATION: Python 3.5 reached the end of its life on September 13th, 20........
You probably didn't do an "update-grub" and grub no longer has any proper menu entries, but before you can fix it let's try to get grub booting anyway.
If you get this lovely black grub screen here's how you can get things booting.
In my case I have a gpt partition with partition 1 and 2. Partion 1 is just my EFI / ESPand partion 2 /dev/sda2 is my root which includes /boot.
You will have to adjust this if you had a separate /boot partition.........
1.) Make sure your conf register is 0x2102
Do show version and at the very end of the output you will see the Configuration register.
show version
Configuration register is 0x2102
If the config register is not 0x2102 then enter this command:
r1#configure terminal
r1(config)#config-register 0x2102
r1(config)#end
2.) Let's Erase the NVRAM/flash........
1.) Create your EFI/ESP Partition
If you happen to have some free space on the drive already then this is easy, just create a new partition of at least 100M.
The nice thing about the EFI spec is that it must just be in the first 2.2TB of space so for most users, it means you can simply resize the last partition(downsize it by 100M) and then add an EFI partition at the end.
For example if you had this partition scheme:
/dev/sda1 = /........
How To Fix This Cisco Switch/Router Error %Error opening tftp
%Error opening tftp://10.0.2.2/network-confg (Permission denied)
%Error opening tftp://10.0.2.2/cisconet.cfg (Permission denied)
%Error opening tftp://10.0.2.2/router-confg (Permission denied)
%Error opening tftp://10.0.2.2/ciscortr.cfg (Permission denied)
%Error opening tftp://10.0.2.2/network-confg (Perm........
This article about migrating to a CentOS 7 /8 RAID mdadm array has a lot of info but I wanted to focus specifically on what newer versions of CentOS 7 require to boot mdadm and what changes are necessary on CentOS 7.8+
CentOS 7 / 8 mdadm RAID booting requirements
This assumes you are chrooting into an existing install or using it to get a new deployment ready. However, these steps can........
Adding a default route is very simple with this command
Just replace 192.168.1.1 with the IPof your GW.
ip route add default via 192.168.1.1
How can you delete this default route if you messed it up?
It's just the opposite with "delete" instead of add
ip route del default via 192.168.1.1
This is the equivalent of the "route command's" route add default gw 192.168.1.1........
Just an FYI that the installer ignores your selection of Boot Loader, as it was intended for MBR/Legacy. The installer horribly, even when choosing "Something Else" and manually partitioning and creating an EFIin your install drive, will still install grub to the first EFI partition it finds, even if you are following a guide like this to avoid wiping out the M........
It may appear to be an Xorg or lightdm/gdm/mdm error but in reality for many users with this issue, it's a driver conflict and issue. I had a system that had two GPUs, an Intel and Nvidia GPU.
The only thing that got it working was to remove the nouveau driver and blacklist it so it never came back, then the Intel GPU works fine without these issues.
Solution
sudo rmmod nouveau
add nouveau/other driver to blacklist
edit th........
Here is how Ifixed it on a Mint/Ubuntu install
1.) First download the latest AMDGPU-Pro driver from here:
https://www.amd.com/en/support
Navigate to your relevant video card:
2.) Download the installer
One issue is that by default they give you a version for the latest version of........
Is your /var/log/journal overweight and bloated? For example a decent install of Debian 11 with most applications and services ends up being about 4.9G with the journal taking a few gigs.
du -hs /var/log/journal/
1.3G /var/log/journal/
By default in a lot of distributions there is no maximum size so it will keep growing. This is especially problematic for embedded distributions and devices, but is also a huge waste of sp........
Usually LIbreoffice gets it right, but if it opens a normal English CSV as UTF-16 by default and shows Asian languages, you'll have ot manually open to fix it (don't double click the file from the File Manager).
Solution - Manually Open the File After Opening LibreOffice Calc
You'll see it is defaulting to UTF-16 which breaks everything.
........
The display manager is more so what controls the main graphical login process after Debian/Mint/Ubuntu boot and controls the graphical login sequence. Once you login, you are then usually passed to an Xorg based Window manager like XFCE, Mate, Ubuntu etc...
Popular display managers are mdm, gdm, lightdm etc... and they all basically do the same thing with a different interface/style and some feature differences.
In Mint for example the normal default display manager is l........
Debian based OS's have a similar issue as the behavior in RHEL/CentOS dhclient, which is that if you have an interface that relies on DHCP, if the first attempt fails, it will quit and stop. This is a problem especially if you are using your Linux as a router or something else mission critical, but where the internet for some reason may have been down or the DHCP server it gets a lease from broken.
The expected behavior you would hope is that when things are back online that the........
If you get this error when trying to SSHto a device or machine and you never even got a password prompt:
Too many authentication failures
This means that either the remote side is configured for key auth only, OR your client side may be attempting to auth using mulitple keys, and that exceeds the amount of attempted authorizations on the remote ssh server.
If the issue is trying to auth too many times which ssh defaults to sending the keys to, you ca........
This error implies that there may be an issue with Xorg or maybe your NVIDIA GPU cannot start or initialize:
35 laptop kernel: [ 2031.857704] nvidia: loading out-of-tree module taints kernel.
35 laptop kernel: [ 2031.857724] nvidia: module license 'NVIDIA' taints kernel.
35 laptop kernel: [ 2031.857725] Disabling lock debugging due to kernel taint
35 laptop kernel: [ 2031.873280] nvidia: module verification failed: signature a........
ID3 2.4 can cause various MP3 players, especially on vehicles or even computers, not to play or at least not to display the ID3 tags.
In many cases though, since ID3 2.4 is much different than version 2.3, it will cause some players, especially in cars like Lexus not to play. Even on the computer, you may notice if you check the properties of the MP3 that it won't open or show any details (eg. frequency, bitrate and ID3 tags).
One symptom of this in a vehicle (eg. Leuxs,........
Bonding is an excellent way to get both increased redundancy and throughput. It is similar to the "Network Teaming" feature in Windows.
There are a few different modes but we will use mode 6, I think it's the best of both worlds, as it is not just a failover, but it provides round robin, so you will get redundancy and load balancing. So if you have a 1G single port, you will have a combined throughput of 4G at this point. Just bear in mind that the true thr........
If you are using mint, delete the preference that stops snap from installing (as it is required for lxc)
sudo rm /etc/apt/preferences.d/nosnap.pref
1. Install lxd:
sudo apt install lxd
Issues install lxd or errors? Click here
Debian at this time does not have lxd so you'll need to use snap:
sudo apt in........
This can be used on almost anything, since Gluster is a userspace tool, based on FUSE. This means that all Gluster appears as to any application is just a directory.
Applications don't need specific support for Gluster, so long as you can tell the application to use a certain directory for storage.
One application can be for redundant and scaled storage, including for within Docker and Kubernetes, LXC, Proxmox, OpenStack, etc or just your image/web/video files or even da........
If your audio is not working and you got this in your syslog:
pulseaudio[13710]: [pulseaudio] sink-input.c: Failed to create sink input: too many inputs per sink.
The issue is generally caused by too many audio inputs, or in other words you have too many applications that are hooked into pulseaudio.
An easy and notorious offender is by having dozens of Firefox browser tabs open.
Solution:
Close all of your Firefox and the problem will........
This may be necessary if you have a VM or if for some reason you just want to be more efficient with your space and have the flexibility of changing your swap space at will.
What we mean is the ability to use a "swap file" or similar to the Windows "pagefile" that normally resides on the root or c: partition of Windows.
Here's all you have to do and then you to can have a single partiton with everything, including the swap file on the root partition if you........
This happens during an apt update and is related to an issue with sources.list, which is particularly troubling, if you are doing a "live-build".
P: Configuring file /etc/apt/sources.list
Hit:1 http://deb.debian.org/debian bullseye InRelease
Get:2 http://deb.debian.org/debian bullseye-updates InRelease [39.4 kB........
(firefox:9562): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Failed to execute child process "dbus-launch" (No such file or directory)
ExceptionHandler::GenerateDump cloned child 9743
ExceptionHandler::WaitForContinueSignal waiting for continue signal...
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
[Parent 9562, Gecko_IOThread] WARNING: pipe error (40): Connection reset by peer: file /build/firefox-EymEXX/fire........
The Best Docker Tutorial for Beginners
We quickly explain the basic Docker concepts and show you how to do the most common tasks from starting your first container, to making custom images, a Docker Swarm Cluster Tutorial, docker compose and Docker buildfiles.........
Why choose OpenVPN instead of a firewall appliance?
OpenVPN can be a reliable and easy replacement for traditional hardware or just be an additional tool that your company uses so that the firewall can focus on its job rather than acting as a VPNappliance at the same time.
When comparing OpenVPN with traditional firewal........
In our 2024 VPS Server/Cloud Buyer's Guide, we place the location of your VPS/hosting/server as one of the priorities that is often overlooked.
2024 Update - Datacent........
These types of errors are normally caused by misconfiguration of your /etc/apt/sources.list.
In this example on Debian 10, if you didn't complete the install correctly, you will have no repos enabled and only rely on CDROM.
"Package wget is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source.
E: Package 'wget' ha........
How To Install Wazuh Server / Quickest Installation
Wazuh (forked from the well known OSSEC project) is a full SIEM (Security Information Event Management) that works extremely well with the platforms it natively supports as an "Agent", which allows you to do scans of everything such as all processes running, CVE vulnerability check, incident reporting etc...
Prerequisites:
A lot of issues with Wazuh seem to be caused by i........
If you get an error that you aren't in the sudoers file, this typically means that your user is not designated as an admin with sudo privileges.
In plain English, when it comes to some OS's like Debian including 10,11 etc.., by default the user is created without special privileges which is contrary to how Ubuntu/Mint handle the secondary user.
Let's check the sudoers file to see the problem.........
1. Let's work from an environment where we can install Ansible on.
If you are using an older version of Linux based on Mint 18 or Ubuntu 16, you may want to get the PPA and get the latest version of Ansible that way:
sudo apt install gpg
sudo add-apt-repository ppa:ansible/ansible
sudo apt update........
Are you getting this error in Proxmox while trying to apt update or install Ceph?
apt update
Hit:1 http://security.debian.org bullseye-security InRelease
Err:2 https://enterprise.proxmox.com/debian/pve bullseye InRelease
401 Unauthorized [IP: 144.217.225.162 443]
Hit:3 http://ftp.hk.debian.org/debian bullseye InRelease ........
For a lot of reasons, it may be convenient to detach or attach live disks to a running VM without having to reboot it. Sure, you can use some network based storage, but when performance counts, attaching a new virtual disk will usually give you better throughput and lower latency in a quick testing situation.
This doesn't work, why not?
drive_add 0 if=virtio,file=/tmp/vm.qcow2,if=virtio,format=qcow2,id=rtt
Can't hot-ad........
How To Install Ceph
If you stopped an install of Ceph midway you will need to manually restart it with "pveceph install"
Remember that your VM needs to have working internet (gateway) and DNS in order to connect to the apt repo to download all of the packages that Ceph requires.
Remember to repeat these steps for each node that you want Ceph on.
........
Here is the scenario, you are using QEMU/KVM and are using something like the AC97 sound driver to pass the host audio to the guest via pulseaudio. This is useful because you can transparently pass your mic input from the host which means you can mute your microphone from the host, which prevents the guest from receiving any mic input even if unmuted.
Mute / Unmute Fix
This issue also seems to happen even if you press the mute button on the microphone and then unmute,........
NAT Network, the VMs can communicate but your host cannot access them by default.
NAT VMs have internet but cannot communicate with each other.
Bridged is simple and allows full LAN access as if you had a physical machine plugged in but is often bad for testing, work or corporate environments and is not very portable when it comes to moving your VMs to other locations and networks.
Here is how you can use NAT Ne........
The Linux Mint team has disabled it by setting an apt preference, you can edit or just remove the file:
sudo apt install snapd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package snapd is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source........
Kubernetes Easy Beginners Tutorial/Architecture Guide
Kubernetes is known as container orchestration and we should start at explaining the container part of it.
A Container is what runs the actual application and based on an Image, and are more comparable to something like an LXC Container, Virtuozzo/OpenVZ using the Linux Kernel Namespaces feature. Containers run these images as independent, isolated operating environments under the O........
There aren't too many simple guides that show you how to use commands to setup your USB or other drive as a normal bootable drive where you can easily boot custom kernels or whatever OS you would like.
1. Get the tools we need:
We install "syslinux" for MBR and "syslinux-efi" for EFI and "MBR" as we need a tool that embeds the actual MBR into our USB:
sudo apt install syslinux syslinux-efi mbr........
This was done on a 2900 but applies to all the switches of the same era.
Step 1 - Power Cycle and enter recovery mode
If you have physical access you can power cycle and hold the mode button down for 15 seconds. After that the SYS light will flash on the switch and you will see the following screenshot.
If you don't have physical access (eg. it is a datacenter swich over console only) then power cycle and hit "Ctrl+Pause/B........
It is common that you may get access to undocumented equipment and need to reset the password. This applies to many Cisco routers whether 2600, 2900, 3900 etc...
Cisco's Guide says to hit Ctrl +Pause/Break but if it doesn't work on some devices causing people to say "cisco password reset pause break does not work", you can see Cisco's alternative key combinations here:........
This seems to be an ongoing issue that is still reproducable in the latest Ubuntu Vbox 6.x.
The default NAT Network range is usually 10.0.2.0/24. If you change this range it does not seem to work properly.
Say we change the range to 10.50.1.0/24
If you get a new lease you will find that you get an IP from the old range but the default gateway is from the new range.
........
So you're trying to browse to a properly configured Samba share but you get this error:
Unable to mount location
Failed to retrieve share list from server: Connection timed out
If your config is right, it can be due to a protocol miss-match where your client has not enabled SMB3 but by default the other side (server) has enabled it.
You can test this out to see with the smbclient tool........
Usually if you get the grub boot loader and it doesn't show any boot options, it's because grub was not installed correctly and/or the partition that it is supposed to be on has changed or does not exist. It can also happen if you install Linux to one drive, but the boot loader to another by accident, whether EFI or MBR/Legacy mode.
You can normally fix your booting/bootloader/MBR/EFI it by chrooting into your root partition:
#become root
sudo su........
Just a quick note and warning is that if you are testing to see if EFIPXE booting works on a VM, MAKE SURE it actually works. For example Iinitially tested using my Distro's QEMU 2.5+dfsg-5ubuntu10.46 and ovmf BIOS firmware (OVMF supports EFI). However, I found on old versions of QEMU (like 2.5), EFIbooting with GRUB NEVER works so it may appear that you have made a mistake when everything is fine when you boot a physi........
Enable "cli" mode equivalent in JunOS
cli
Configure Mode
configure
So rather than going to the console on a Cisco switch and typing "enable" and then "conf t", the equivalent in JunOS is "cli" and "configure".
How Do You Apply Changes You've Made?
You can make all kinds of changes to the switch, but remember they are not........
Aruba has a very traditional "admin" for user and password by default for many of its appliances. If you've reset or just got some new units this will be the default password that you should change immediately for security reasons.........
Traditionally kernels were numbered starting from 0 but by default the "new style" of grub boot loading considers each subkernel item to be different so if you have 3 entries for 4.40-148 rather than counting for 1.
To get the expected behavior let's show this example and how we can boot it
We do a grep on menuentry in /boot/grub/grub.cfg to see all of the bootable kernels rather than scrolling through loads of extra entries we don't care about (thou........
It seems that QEMU/KVM's default PS2 mouse and keyboard doesn't work right in most cases. I have especially observed issues using Ctrl+C and Ctrl+V and in Linux you may see repeated key presses in the terminal and you will wonder why you copied something and it's not in the clipboard when you try to paste. The way to temporarily fix it is to press the key that is repeating once(works in Linux but not really in Windows).
Sometimes when moving your mouse it will also s........
One simple flag to configure will create a makefile that statically links all the shared objects and embeds them instead the binary execute. This means as long as you have the same architecture that things should run.
Eg. if you have an old version of Debian with a different version of glibc, then this will solve that problem.
./configure LDFLAGS="-static"
To test that it is really statically linked run ldd:
ldd src/wget........
Many people may not be aware that you can turn commodity hardware into a Mikrotik OS and there are various options which is "CHR" (Cloud Hosted Router) which is a VMimage meant for Virtualization only (seriously, I've tried to dd the image to a physical server and it just crashed as it does not contain any drivers for physical).
One note as well if you are trying to do a baremetal install you may get an error "Error Loading Operating System" or........
The problem seems to be that whatever kernel and initrd you have is tied to an old version of CentOS 7 that is no longer in the current repos of most mirrors.
If you were previously able to PXEboot and install CentOS and you are sure your network and tftp are good the problem is that you have an outdated kernel and initramfs that point to a defunct version.........
The below appears at first to be a bad mirror DNS error, but if you've ruled that out you just need to clear your broken yum cache and things will be good.
yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: centos.01link.hk
* extras: centos.01link.hk
* updates: centos.01link.hk
http://mirror.worria.com/centos/7.8.2003/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not........
This normally works but if not use my mencoder solution if the output video does not play past the joined time.
the contents of list.txt need to look like this:
file somefile.mp4
file somefile2.mp4
then run ffmpeg
ffmpeg -f concat -i list.txt -c copy CME-2-router-dial-peer-final.mp4
The result is almost instant joining since there is no video processing since we are........
When you automount a drive in /etc/fstab even if it's not important like an external drive that you only use sometimes and is not required for booting, it will prevent a successfuly boot.
If you disable quiet mode for booting you will see something like below "A start job is running for dev-disk ...."
How do we fix an fstab entry from preventi........
A very common use case is that you don't want to waste time using a video editor that requires you to open it up and manually import the video clip and audio clip, then manually delete the old audio track and import the video and new audio. That's too much work and time since we don't want to go through the hassle.
ffmpeg is our solution, all we have to do is specify 3 variables and we're done!
-i Windows2019-Server-Noaudio.mp4 is our in........
The best way to avoid this problem is to understand how your BIOS is setup to boot.
Often newer machines will default to U(EFI) which is different than the traditional MBR/Legacy mode.
The problem is that this may not be apparent, often a BIOS Boot Menu will show a Legacy Boot Option and EFIOption without defining it.
A good example of this is if your USB is called "Kingston" you may see in your Boot Menu "Kingston" and also "Ubuntu"........
This assumes your system is a fresh and normally working install.
What often happens is that many new devices have multiple audio outputs which are generally analog and HDMI/Digital out. Sometimes the OS defaults to the wrong one that you didn't want.
For example if your sound is supposed to play over the HDMI, perhaps the output is set to analog or vice versa.........
This happens to a lot of Nvidia users especially users of newer cards like the RTX series. If for example you are trying to boot and install Linux and you get a black and white grub2 screen instead of a nice graphical welcome installer, you probably suffer from this bug. It is normally followed by the user booting and finding they just have a blank/black screen.
Here is the quick flow of steps to fix it:
If you get a black grub scree........
Before you try to install and dual boot it is very important to understand the concept of "what boot mode your BIOS is in" and "what mode you booted the installer to".
Then follow the example of Linux Mint (but most Linux installers are very similar)to carefully understand WHERE you are installing your Boot Loader to whether that be MBR or EFI.
How Am IBooted?
First it's important to check your BIOS to see........
Cannot register the hard disk '/some/path/windows-marking.vdi' {f54def00-2252-43f5-9178-0998636cad61} because a hard disk '/other-path/windows-marking.vdi' with UUID {f54def00-2252-43f5-9178-0998636cad61} already exists.
Result Code:
NS_ERROR_INVALID_ARG (0x80070057)
Component:
VirtualBoxWrap
Interface:
IVirtualBox {0169423f-46b4-cde9-91af-1e9d5b6cd945}
Callee RC:
VBOX_E_OBJECT_NOT_FOUND (0x80BB0001)........
It really seems limited in that it can mainly give you the things you would see on the physical unit such as load etc..
wget https://downloads.sourceforge.net/project/apcupsd/apcupsd%20-%20Stable/3.14.14/apcupsd-3.14.14.tar.gz?r=https%3A%2F%2Fsourceforge.net%2Fprojects%2Fapcupsd%2Ffiles%2Flatest%2Fdownload&ts=1598115866
tar -zxvf apcupsd-3.14.14.tar.gz
cd apcupsd-3.14.14
[root@somebox apcupsd-3.14.14]#
./conf........
This seems to happen on most if not all Nvidia cards but the good news is that if you are using any of the Linux drivers and have the nvidia-settings tool installed it is just a simple command.
Solution:
nvidia-settings --assign CurrentMetaMode="nvidia-auto-select +0+0 { ForceFullCompositionPipeline = On }"
Enter the above command in your terminal and the screentearing will be fixed which is like enabling Tear Free on AMD cards.&........
-?????????? ? ? ? ? ? shadow
----------. 1 root root 748 Jul 10 04:35 shadow-
cat: shadow: Input/output error
If you see this you are probably in big trouble, it could be a physical error or if it's a VM image that it is corrupted due to a physical error on the underlying disk/array/NAS or it could a........
/usr/libexec/qemu-kvm -enable-kvm -boot order=cd,once=dc -vga cirrus -m 4096 -drive file=~/23815135.img,if=virtio -usbdevice tablet -net nic,macaddr=DE:AD:BE:EF:D4:AB -netdev bridge,br=br0,id=net0
qemu-kvm: -usbdevice tablet: '-usbdevice' is deprecated, please use '-device usb-...' instead
access denied by acl file
qemu-kvm: bridge helper failed
[root@CentOS-82-64-minimal 23815135]# /usr/libexec/qemu-kvm -enable-kvm -boot order=cd,once=dc -vga cirrus -........
yum -y install gcc make gperf genisoimage flex bison ncurses ncurses-devel pcre-devel augeas-devel augeas readline-devel
checking for cpio... cpio
checking for gperf... no
configure: error: gperf must be installed
configure: error: Package requirements (augeas >= 1.2.0) were not met:
Requested 'augeas >= 1.2.0' but version of augeas is 1.0.0
yum remove augeas augeas-libs augeas-devel
wget http://downl........
apt install software-properties-common
add-apt-repository ppa:deadsnakes/ppa
apt update
apt install python3-pip
apt install python3.7 curl gnupg python3.7-dev git
ln -s /usr/bin/python3.7 /usr/bin/python3
pip3 install numpy keras_preprocessing
curl https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel........
Iam going to build this based on a series of small howto QEMU / KVMposts I've made as I feel much of the information is actually hard to find and piece together from the rest of the web.
What I'm going to focus on is how to use virtio as the NIC because if you don't you get very slow NIC speeds but with the virtio NIC model you basically get host speeds.
/usr/libexec/qemu-kvm -enable-kvm -smp 8 -m 16000 -net user -net nic,model=virtio -drive file=ubuntu-gpt2l........
Most newer distros inexplicably cause your NIC to have what Icall "random" non-standard name conventions because of systemd.
This is a big problem for many people and especially those running servers. Imagine that you have a static IPconfigured for ens33 but then the hard disk is moved to a newer system, the NIC could be anything from ens33 to enp0s1, meaning that manual intervention is required to go and update the NIC config file (eg. /etc/network/interfa........
When authentication times out that is one thing, but when it just fails like below Asterisk by default will not re-register until you the admin reload the sip or asterisk server:
voipserver*CLI> sip show registry
Host dnsmgr Username Refresh State&........
Just run this apt install command
sudo apt install pepperflashplugin-nonfree browser-plugin-freshplayer-pepperflash
After this restart your browser and check Adobe's site to verify if your Pepper flash is working and showing at least version 32.
https://helpx.adobe.com/flash-player.html
As you'll see below it will download the latest version which is currently 32 and this was not possible with the old/crappy deprecated adobe-flash plu........
I used to believe that for Desktops especially that the "ondemand" CPUfrequency changing that kernels included with Ubuntu and Debian based distros have would be sufficient for snappy performance.
However, you can feel the lack of performance on the fastest computer if you have ondemand. A lot of times even under high load 100% of your CPUfrequency in MHz will not be used.
For example a 2.8Ghz CPUmay only run at 1.8MHz or even .9GHz. Now........
There are a few caveats that may not be obvious to everyone so I am going to cover them here but keep this in mind before starting.
Before starting install epel or you will be missing tesseract:
yum -y install epel-release
#1) When you specify your SSL certificate with a full path, it really needs to exist where you tell it to (including the default location of /etc/ssl/certs and /etc/ssl/c........
If you've ever gotten errors like this the solution is simple, you need i386 enabled on your 64-bit install because wine depends on some 32-bit x86 libraries:
dpkg --add-architecture i386
apt update
apt install wine
After that it will install just fine.
apt install wine
Reading package lists... Done
Building dependency tree
Reading state information... Done........
This is sure simple if you follow the guide but it took a lot of hacking around to make this work on Debian/Ubuntu!
Now before you ask why bother running wine and python, the reason is because Python executables are NOT cross-platform. If you run pyinstaller in Linux, that binary will only run on Linux and the same if you do it in Windows. So it is preferable if you have a single environment that you can create Linux and Windows binaries from rather than running 2 separate........
Mar 22 13:46:14 box named[31767]: validating @0x7f51bc001550: . DNSKEY: unable to find a DNSKEY which verifies the DNSKEY RRset and also matches a trusted key for '.'
Mar 22 13:46:14 box named[31767]: validating @0x7f51bc001550: . DNSKEY: please check the 'trusted-keys' for '.' in named.conf.
Mar 22 13:46:14 box named[31767]: error (broken trust chain) resolving './NS/IN': 192.36.148.17#53
One possibility is sometimes that your time is ou........
httpd: Syntax error on line 221 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/php.conf: Cannot load modules/libphp5.so into server: /lib64/libresolv.so.2: symbol __h_errno, version GLIBC_PRIVATE not defined in file libc.so.6 with link time reference
This is usually caused by a mismatch in OpenSSLversion. Interestingly enough a lot of times if it has happened during an update of your system, or after, usually just restarting httpd........
Occasionally my whole screen locks up and I cannot even swith to the console and I find this in my syslog:
*-display
description: VGA compatible controller
product: Mullins [Radeon R3 Graphics]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
 ........
MySQL on Debian versions is configured differently than the native local MySQL plugin so you will be disappointed when your password on the mysql client fails by default.
Here is how you reset the MySQL root password the proper and "working way"
#first we gracefully stop mysql
sudo systemctl stop mysql;
#then we forcefully kill any mysqld process just in case
sudo killall -9 mysqld mysqld_safe;........
This is only really necessary in the case you don't want DHCP. If you are dealing with an encrypted LUKS server on the internet, you will often want to have a static IP so you know which IP to connect to (or if you have a semi-static IP assigned by DHCP).
SET IP Address by /etc/initramfs-tools/initramfs.conf
IP Address=192.168.1.27
Gateway=192.168.1.1
Subnet Mask: 255.255.255.0
Hostname=myhome.com
IP=192.1........
The reason for doing this is that the installer doesn't seem to work properly for LUKS and the server installer doesn't even support LUKS anymore. When you use the GUI install on Desktop for LUKS it won't boot and will just hang after you enter your password. So the only reliable way is to do it ourselves.
1.) Make a default minimal install of Ubuntu
2.) Have a secondary disk on the server or VM.
3.)........
Create your netplan file
vi /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: no
........
The cool thing here is that we only need 1 drive to make a RAID 10 or RAID 1 array, we just tell the Linux mdadm utility that the other drive is "missing" and we can then add our original drive to the array after booting into our new RAID array.
Step#1 Install tools we need
yum -y install mdadm rsync
Step #2 Create your partitions on the drive that will be our RAID array
Here I assume it is /dev........
sudo vi /etc/lightdm/lightdm.conf.d/70-linuxmint.conf
Change this:
[SeatDefaults]
user-session=mate
allow-guest=false
To this:
[SeatDefaults]
user-session=mate
allow-guest=false
greeter-hide-users=true
greeter-show-manual-login=true
To see and apply your changes just restart light........
The problem is that by default ssh-keygen loves to generate an easy to crack 2048 bit key (RSA). Supposedly having a larger keysize helps such as 4096 or 8096 but it is thought to be useless still against Quantum computing.
How can I check my existing keysize and type?
ssh-keygen -lf /path/to/your/id_rsa.pub
The output will be something like below followed by the hash. The first number is the key size and the second part will b........
A lot of times this is actually caused by simply not having Firefox installed at all.
selenium.common.exceptions.WebDriverException: Message: Can not connect to the Service geckodriver
https://github.com/mozilla/geckodriver/issues/270........
In this case I am executing using "python3" but what you find in cases like this can be surprising.
The most common issues are that someone has a module for python 2 "pip" and doesn't realize they need "pip3" to install it for python3, but this is not one of those cases.
ModuleNotFoundError: No module named 'bs4'
OKmaybe we didn't install it for python3?
[........
To enable amdgpu we have to set special kernel boot parameters. The easiest way is to make it permanent and apply to all kernels (no messing around with grub.cfg) so we'll edit those defaults in /etc/default/grub by changing the GRUB_CMDLINE_LINUX_DEFAULT parameter. After that don't forget to run "update-grub"to apply it (otherwise amdgpu will never be enabled).
The opensource driver for AMD is really quite impressive these days, as we show it works with ve........
If you just do a normal chown user.user somedir it won't work. You will see the ownership is still the previous owner.
How To Change Ownership Of Symlink:
The simplest part is just adding the -h which means no dereference so it applies the ownership on the symlink and does not try (and fail) to change ownership of the dereferenced symlink destination.
chown -h user.user somedir........
It is fairly simple to use once you know how to use it. However, the tricky thing is that by default it doesn't seem to be active or listen on any interface on manually specified.
How To Install ifplugd
First we install ifplugd
sudo apt install ifplugd
Let's enable it on our desired device(s)
vi /etc/default/ifplugd
set this line as so:........
I find that the default settings for the radeon driver that is applied to most AMD cards is horrible. For example by default TearFree is not enabled and it causes videos to have some kind of square artifacts.
Here are the settings I have found most suitable for AMD cards:
You need to create file in the following path and restart Xorg or your computer to apply it:
*Beware that making a mistake here will possibly make your computer........
This is a gotcha but be aware sometimes iptables may be active and loaded by default.
Also make sure you don't just disable firewalld but also stop it otherwise it will still block stuff:
systemctl stop firewalld
If the above is not the issue then it is possible iptables is running and blocking stuff too, so you'll need to stop iptables.
So in addition to opening firewalld or disabling it, you would need to disable iptables........
yum -y install mariadb-server
systemctl start mariadb
mysql_secure_installation
Now we need to secure our install and set the MariaDB root password:
The lines you need to act on are marked in bold shown with the answer you need.
mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SER........
You need to disable vsync like this when running glxgears:
vblank_mode=0 glxgears
For Nvidia drivers do this:
__GL_SYNC_TO_VBLANK=0 glxgears
Notice the higher than 59-60 fps results with vblank_mode=0:
ATTENTION: default value of option vblank_mode overridden by environment.
7919 frames in 5.0 seconds = 1583.704 FPS
8187 frames in 5.0 seconds = 1637.266 FPS........
Downloading and compiling from source to get the latest version of Asterisk is really simple with this guide.
apt install gcc make g++ libedit-dev uuid-dev libjansson-dev apt install libxml2-dev sqlite3 libsqlite3-dev
wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-16-current.tar.gz
tar -zxvf asterisk-16-current.tar.gz
cd asterisk-16.6.2/
./configure
If you get this error change y........
Use fdisk on your USB drive to create a bootable NTFS partition (in my case /dev/sdb):
sudo fdisk /dev/sdb
Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)........
If you are using the default "Image Viewer" aka Xviewer it seems to die on very large resolution files. It seems to understand to scale them but the printer will try to print and then fail.
Using "Pix" viewer seems to fix this and causes these larger files to print just fine.
........
If you can print other PDFs but not a particular one it is very likely that the PDF size is A4 (the longer, skinnier Asian paper size) instead of the North American letter size ( 8.5" x 11"). This breaks printing in most cases. Or it may print if you find a program that ignores the size issue.
Here is an example of an A4 being rejected by a printer in Ubuntu Linux via CUPS
Cannot print PDF CUPS Samsung C460:
Processin........
It is very silly but the default on the ifup-eth script tells dhclient ( the program that obtains a DHCP IPaddress if you have selected DHCPin your ifcfg-eth* config file) to EXIT / QUIT if the first attempt to obtain a lease fails.
No amount of dhclient.conf settings will fix this because if dhclient is started with -1 (which it is by default)then dhclient will quit.
This is obviously very bad for MOST cases. Say for example you have a power outage or........
Just edit your tftp file for xinetd like this:
*Change the IPto be the IPof the interface you want to listen on.
To test if your tftp is available on a certain IP range use nc -u yourip 69 to see if you can still connect (/var/log/messages or /var/log/syslog) should show the connection if it is open.
Oct 13 23:20:34 01 xinetd[26631]: Started working: 1 available servic........
sudo pip3 install python-docx
[sudo] password for :
Downloading/unpacking python-docx
Downloading python-docx-0.8.10.tar.gz (5.5MB): 5.5MB downloaded
Running setup.py (path:/tmp/pip_build_root/python-docx/setup.py) egg_info for package python-docx
no previously-included directories found matching 'docs/.build'
warning: no previously-included files matching '.DS_Store' foun........
Video Links:
How To Setup 2 Phones on a Single CME Router and get the GUI going.
How to use Dialpeers with CME with two routers
How to implement call restrictions using COR / Class of Restriction
Set your clock:
HH:MM:SS
clock set 22:00:00 24 September 2024........
A common method in bash is to assign output to a variable like this:
somevar=`uptime`
That works too but it could be more efficient to do something like this:
if [[ $(uptime|awk '{print $3}') > 20 ]]; then
echo "uptime greater than 20 days";
fi........
This often happens if you are adding a secondary route, especially with Linux source based routing.
ip route add default via 10.10.10.254 table 10
RTNETLINK answers: Network is unreachable
If that happens you will probably find that it is unreachable because your NIC does not have an IP in the 10.10.10.0/24 range so just assign an IP in that range to your NIC and try again.
eg. ifconfig eth0 10.10.10.254 netmask 255.255.255.0 up........
By default at least on Centos 7 nfs only allows 8 connections and starts 8 nfsd daemons.
To fix this edit this file:/etc/sysconfig/nfs
Edit the line "RPCNFSDCOUNT" (uncomment it so it looks like this:
RPCNFSDCOUNT=30
In the example above we are setting 30 nfsd daemons to run (or in other words 30 connections are possible this way).........
Now older versions of qemu-kvm didn't throw this error say if you just had "-video cirrus" when starting qemu-kvm. But newer versions do care.
And this probably only applies to you if you are running from bash/terminal with remote kvm images.
What you need to do is remove the "-video" part and just add -vnc :5
eg. this would fix the error:
qemu-system-x86_64 -enable-kvm -boot order=cd,once=dc -m 1024 -drive........
Having a network bridge allows you to bridge traffic under multiple devices so they can talk natively without using any special routing, iptables/firewall or other trickery.
To create your bridge you need the bridge-utils package for brctl and if you want to do things like bridge VMs that run on a tap device you will need the uml-utilities which provides "tunctl".
1.) Install the utilities to make our bridge
sudo apt-get i........
By default your DHCP will often not work because it is not listening on any interfaces.
All you have to do is edit this file:
vi /etc/default/isc-dhcp-server
then find the "INTERFACES" line and add each interface that should listen:
INTERFACES="br0 enp0s10"
........
I think this is more so an issue with kernel modules not being included. I had this issue on Linux Mint because a new kernel I upgraded to DIDNOT have the "extra" modules and part of that reason is also because older kernels are named differently than new ones.
Take this example article below that shows it in action.
If you were previously........
cat .htaccess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]
I keep reading there is a "# BEGIN WordPress" and a "# END WordPress" in the wordpress htaccess above but there is clearly not.
Even more strange is that my permissions are just 444 (read only).
so i changed it........
It is really simple using .htaccess with mod_rewrite.
Here is all you need:
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://site.com/$1 [R=301,L]
Another more graceful way is to use the %{SERVER_NAME}variable to make it dynamic. Just be careful that the server name will always match what you expect. (eg. if you are doing load balancing or clustering what if the server name may be somethi........
CPU:Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz
MOBO: Manufacturer: ASUSTeK COMPUTER INC.
Product Name: P8H61-M LX3 PLUS R2.0
qemu-kvm-0.12.1.2-2.506.el6_10.1.x86_64
This is weird but the only OS I've found this machine doesn't work with is Windows 2019 Server. Ihave no idea, when 2008, 2012 work f........
By default bind will not respond to outside queries for security reasons.
In most distributions you will find the default in /etc/named.conf looks like this at the top under options:
listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";........
You'll have to edit the policy.xml file to fix this:
convert -density 300 output.pdf agreement.jpg
convert.im6: not authorized `output.pdf' @ error/constitute.c/ReadImage/454.
convert.im6: no images defined `agreement.jpg' @ error/convert.c/ConvertImageCommand/3044.
sudo vi /etc/ImageMagick*/policy.xml
Change
policy domain="coder" rights="no........
This is a security hole in my opinion and should be plugged by editing the lock screen ui layout:
vi /usr/share/mate-screensaver/lock-dialog-default.ui
#find these objects and set the visible property to false
object class="GtkLabel" id="note-tab-label"
object class="GtkLabel" id="auth-username-label>
object class="GtkLabel" id="auth-realname-label"........
By default printscreen or alt print screen will get the whole desktop or the application in focus, respectively. But what if you want to select a portion of the screen?
gnome-screenshot:
ksnapshot
compiz
This is a nicely integrated solution
sudo apt-get install compizconfig-s........
Opening Firefox from the CLI reveals the following as the cause of the error:
Query failed: Error: Error(s) encountered during statement execution: no such table: moz_favicons
The symptoms of this issue are that in the address bar you cannot hit enter to browse to a site/url/address and your history cannot be accessed, nor does your history show up in the address bar when typing previously used addresses.
This usually happens because you've........
Install Errors on Version 12:
This error happened on QEMU emulator version 2.11.1 pve-qemu-kvm_2.11.1-5
on Proxmox/Debian but installing on QEMU.12 on Centos 6 did not produce the error.
*Update it is not related to the OS or QEMU version. This happened in Centos 6 too after a second install.
What really causes this even though you successfully install........
nmap by default only scans the most common, 1000 ports.
How about if you want all ports because some services may be listening on non-standard ports?
Just use the -p- switch for all ports or -p1-65535
nmap -p- somehost.com........
It is almost as intuitive as we would like it is just a *.
So literally:
*INA 127.0.0.1
Complete working bind zonefile below:
$TTL 86400
@ IN SOA ns.rtt.ca. ns2.rtt.ca. (
1247605715; Serial
&n........
The strange thing is that usually the first install or two will work on any new machine but then it suddenly won't. I had this experience on QEMU 2.13 on a different machine. There is something finicky or buggy about the CUCM installer even when choosing the same virtual hardware specs.
qemu-kvm command:
/usr/libexec/qemu-kvm -version
QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2-2.506.el6_10.1), Copyright (c) 2003-2008 Fabrice Bellard
........
2,6,A or E is what the second digit of your MAC address must be otherwise a lot of OS's will not work. They will say the NIC is down/not connected even though it is.
This is because if the second digit is not set properly it will not view as a valid MAC or device uplink. This is especially an issue with VMs whether in QEMU etc.. if you are making your own MAC.
MAC address is invalid
c4:d1:aa:e5:10:05
To fix it just........
There are multiple layers but most are enabled by default such as the setting in the Phone Device Settings.
However the one not enabled by default is the one in "Enterprise Phone Configuration".
Enable "Cisco Camera" and then reboot your phones to enable it.........
DN = Directory Number:
It is basically the extension of the phone
In the example below, 55 is a DN assigned to the phone.........
Are you tired of coming back to your computer only to find your SSH connections have been broken? Even worse are the ones that hang where it appears to be connected but it is really not.
The one option you have is an SSHclient side modification to send KeepAlive packets, sometimes this can also keep up your WiFi connection and stop it from disconnecting you as well.
To make the keep alive changes for your just yourself (not system wide)........
This is the closest way to disabling it without using the "libata.force=noncq" kernel boot option is to set the queue to a depth of 1 which doesn't actually disable it.
Change the sdc below to match the device you want to disable NCQ for.
[root@officebox ~]# echo "1" > /sys/block/sdc/device/queue_depth
Errors that indicate you are having a performance issue are these in messages or dmesg relating to N........
This is usually because the Group Policy forbids that user or group from logging in.
run "gpmc" (not "gpedit.msc" as that is for local computer settings when you are not using Active Directory) or go to Administrative Tools and Group Policy Management.
Edit the default domain policy like below........
If you visit a site that exploits the WebRTC vulnerability including whatismyipaddress.com it may show "Local IP Address" which would be the real IP of your machine.
The vulnerability works on Windows and Linux machines (contrary to false information on the web which claims it only affects Windows).
The above works and happens even if you are using a proxy or VPNaccount like ProVPNAccounts.com
It is easy........
https://docs.microsoft.com/en-us/powershell/module/skype/?view=skype-ps
Troubleshooting Client Connectivity Issues
The first step is to enable full logging in the Skype Client itself and then check the log on the client side. In Windows this normally means going to the Skype client "settings" and then "Enable Full Logging".
Aft........
Perhaps you've just seen this in the bash prompt:
-bash-4.1#
Instead of the expected user@hostname#
It is probably because you are missing .bash_profile or .bashrc in your home directory
Check for yourself:
ls -al ~/|grep -E ".bash_profile|.bashrc"
-rw-r--r--. 1 root root&nbs........
Install Issues:
How to Make CUCM iso /modify to work on non-VMWare machines like QEMU/Xen/OpenStack
If you get kernel panic errors in VBOX usually disabling Nested Paging will fix the issue (thanks to Mark).
ks_pre.sh error is caused by having the wrong VDX pattern (change it do sd per guide link above) and/or the wrong VMSpecs (Cisco req........
For some reason, perhaps you don't want to run a daemon or let Letsencrypt have access to your production server.
There is a way to use it like a normal CSR/CA setup in manual mode.
./letsencrypt-auto certonly --manual -d realtechtalk.com - www.realtechtalk.com
Â
Eventually you will get prompted to create a certain path and file with certain data:
Create a file containing just this data:
Casdfasfadsfsad........
Enter configuration console:
enable
configure terminal
This is important because if your console doesn't look like below none of the commands will work!
Switch(config)#
Save and Apply Settings
wr
Show Switch Configuration:
show run
Show Port List/Sta........
This works on the 2000 and 3000 series generally.
*The easy way is to just hold the mode button for 10+ seconds.
The full/proper way is below:
1.) Either power on the unit and hold the "mode" button or hold the "mode" button until you see the below:
00:04:08: %SYS-7-NV_BLOCK_INIT: Initalized the geometry of nvram
00:04:08: %EXPRESS_SETUP-6-CONFIG_IS_RESET: The configur........
By default telnet is not enabled or installed on the latest Windows servers so you'll get an error saying:
telnet is not recognized as an internal or external command
dism /online /Enable-Feature /FeatureName:TelnetClient
........
This is not about systemd/systemctl and not about "onboot" so there's no rc.local trick here but it's the GUI/Gnome etc when a user logs in that a command is launched.
Put this in your home dir
The .config/autostart directory is where Linux Mint/Ubuntu checks for autostart application config files
mkdir -p ~/.config/autostart
Create a new entry/file that starts an application........
Do you hate how Centos 7 defaults to allocating most of your valuable space to /home even though it is a production server?
Here is a quick guide on how to take back that space live, while online (of course make sure you have backups just in case something goes wrong!):
First we will reduce our home dir by 100G:
lvreduce -L -100G /dev/mapper/centos-home
WARNING: Reducing active and open logical volume to ........
The defaults in Windows 2016 server leave clients crippled so they can't even download basic files or software. But Group Policy Management Editor comes to our rescue!
Use cmd or Powershell and run:
gpme.msc
Choose your domain/computer and then navigate like below and create a new menu entry for IE11 or whatever your version is. Don't be worried if the highest version is IE10 it means that it applies to IE10 AND above.........
Whether you are at work, at the coffee shop or on the public internet here are some basic but effective rules for iptables that lock things down (eg. no one can SMB or SSH to you or really anything):
# Generated by iptables-save v1.4.21 on Fri Dec 14 14:00:08 2018
*nat
:PREROUTING ACCEPT [160:19844]
:INPUT ACCEPT [4:357]
:OUTPUT ACCEPT [2955:182236]
:POSTROUTING ACCEPT [2955:182236]
COMMIT
# Completed on Fri Dec 14........
The main use I have for this is virtual servers being able to use an LVM volume but not occupying all of the space. It saves time in deploying machines and copying them so you are only copying the space they are using (eg. 5GB / 60GB vs the full 60GB). There are some disadvantages which is mainly the fact that thin pools by their nature allow you to "overallocate" disk space which is that you could use more space than is available on the disk itself and corrupt your data........
By default VMWare Workstation often doesn't work as we would like.
If you create a VM with a default NAT IP it won't work you will find the NIC is disconnected (even though on the VMWare side it says connected including at Power On).
How To Solve It
1.) Create New VMNet for NAT
Click "Edit" -> "Virtual Network Editor"
Click "Add Network"
Select Network To Add "VMNet1" (........
I tried to stop a qemu-img copy or clone and it broke everything. It was fine to "stop" it from the GUI but a process still persisted so I killed the relevant qemu-img and the kernel went crazy. It also may not have helped that I tried to lvremove a different volume (an unused disk). But either way it breaks LVM (you cannot even run lvdisplay) so a reboot is necessary.
Jan 17 06:45:21 testserver kernel: [ 5680.439337] systemd-udevd D 0&nbs........
In Debian a lot of times SSH disables the root user to login by password by default. This means you will get an authentication failure as if you typed in the wrong password.
The logs also indicate the password is wrong but what is often the case is in the config file
Check /etc/ssh/sshd_config
cat /etc/ssh/sshd_config|grep -i permitrootlogin
Make sure it says:
PermitRootLogin yes
If not change it and restart SSH........
1.) Create Image using qemu-img
qemu-img create -f qcow2 skype.img 40G
2.) Start VM using flags
-m = memory in MB
-drive file=yourimagefile.img
-cdrom /path/to/the.iso
qemu-system-x86_64 -m 4096 -drive file=skype.img -cdrom ~/Downloads/SfB-E-9319.0-enUS.ISO
Enable Bridged Networking........
This should apply to most Linux distributions just incase you get into trouble or wipe out the defaults by accident.
/etc/iproute2/rt_tables
#
# reserved values
#
255 local
254 main
253 default
0 unspec
#
# local
#
#1 inr.ruhep........
Below are the common errors you'll get with named AKA bind if your time is incorrect.
The simplest solution is to install and run ntpd to correct your system's time (install ntpd if it is not installed)
systemctl start ntpd
systemctl enable ntpd
Dec 20 13:36:16 hostingbox named[2169]: error (no valid DS) resolving 'develop.waxrain.com/A/IN': 14.215.150.17#53........
A lot of people just have a -j DROP to drop all unwanted traffic or traffic not explicitly allowed but there is a better solution if you want real and proper logging:
Here is another example of more advanced iptables rules.
Take an example iptables rules file
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i eth1 -p icmp -j ACCEPT........
On a test machine Iwas never able to access to a newly created 4th partiton. As we can see there are dev devices for everything but the 4th partition.
The normal "partprobe" or "kpartx" or kernel being told to rescan the block device didn't help (only a reboot did).
fdisk -l /dev/sda
Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units........
First we need to create dhclient.conf if it doesn't exist or edit it:
vi /etc/dhclient/dhclient.conf
#add this line at the top add the IPs as commas they will be the highest priority nameservers and whatever your ISP gives you will be used after these one (good for DNS backup)
prepend domain-name-servers 127.0.0.1,10.10.25.8;
After you restart your network or run dhclient again you should see the contents of........
First you need the "iptables-persistent" package. This gives you an init script that loads your settings from /etc/iptables/rules.v4 and rules.v6
When you install it, it wll save your default setings in /etc/iptables.
sudo apt-get install iptables-persistent
Remember that the rules are stored here:
For IPV4: /etc/iptables/rules.v4
For IPV6: /etc/iptables/r........
initiator = client
target = server
These are the first concepts you should understand which is that in iscsi essentially the "initiator" is the client and the "target" is the server.
iSCSI is derived from the old fashioned SCSI that us oldtimers grew to love. The "i" stands for Internet and the SCSI stands for "Small Computers Systems Interface" (SCSI).
iSCSI Target (Server)Setup
targetcli is the pac........
< a href="/Products/MX72244">
< span class="c-shca-icon-item__body-name-brand">
ADATA
< / span>
&nbs........
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/pdo_mysql.so' - /usr/lib64/php/modules/pdo_mysql.so: symbol mysql_options, version libmysqlclient_18 not defined in file libmysqlclient.so.18 with link time reference in Unknown on line 0
#not sure what is wrong with php-mysql but I removed it and installed mysqlnd
yum -y remove php-mysql
yum -y install php-mysqlnd........
Cisco's CUCM (Cisco Unified Communication Manager) is a system that combines voice, video, data and mobile products into a single unified management suite. At its core, the CUCMis like a "Super PBX" that controls the flow of all communications through an organization even single or multiple site deployments.
Cisco's CUCMmakes communication more effective and simple through centralized management and unification of communications resources.........
What Is Active Directory?
Active Directory is essentially an enhanced, centralized database with a set of objects that make user management, authorization, and data management simpler. Active Directory is synonymous with "Domain Controllers" where a single "domain" often consists of multiple sites and members of the domain. Multiple domains can also be joined to belong to a tree ( a collection of domains). And the highest layer is the forest whi........
grep -E servers1[2-6] somefile.txt
The 1 before the [ bracket means that the number must start with one and can be between 1 and [2-6] or in plain English between 12-16.
........
systemd is like the service manager for your Centos and other modern Linux distributions (including Debian/Mint/Ubuntu) allows you to enable services, stop them, restart them, check their status and even reboot your system.
The key commands or arguments you will use with systemctl are the following:
Unit Commands:
list-units [PATTERN...] List loaded units
&nbs........
umask are the default permissions that are applied when a file or directory are created. To see this in action simply just "touch filename" or "mkdir somedir" and you'll see what default permissions are applied.
The first thing Ialways tell people you should know is to NEVER change the defaults unless you are making them more restrictive. But they work well and if you change the defaults you could end up creating a file without permission to read........
Did you just install the minimal version by accident or want to install the GUI? No need to reinstall just tell yum to do the work for you!
You could actually have both installed and choose one as your preference on demand (although many people prefer GNOME's simplicity).
Step 1.)
Install Gnome and/or KDE.
To install the GNOME Desktop on Centos 7:
yum -y groups install "GNOME Desktop"
To........
An error occurred during a connection to some-ip-or-domain. SSL peer reports incorrect Message Authentication Code. Error code: SSL_ERROR_BAD_MAC_ALERT
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.
**Solution**
Go to about:config........
After starting the install it stalls here:
admin/index.php?cache=0&agreelicense=1&confirmrelease=1&lang=en
If you manually refresh you get a Plugins check screen:
Installation
System
Moodle second step fails just blank screen:
https://domain.la/user/editadvanced.php?id=2
Solution: give up and choose something else it shouldn't be thi........
[root@localhost:~] vmkping -I vmk1 10.0.2.69
PING 10.0.2.69 (10.0.2.69): 56 data bytes
sendto() failed (Host is down)
vsphere distributed switch vmotion not working
[root@localhost:~] esxcfg-route -l
VMkernel Routes:
Network Netmask Gateway Interface&........
Usually this is because when you created your user you added a user but didn't create their home directory and/or for some reason your .bashrc and .bash_profile in ~ (home) is broken/missing.
In your home just create the following files with the following content to solve it:
.bashrc and .bash_profile.
To apply it just relogin/start a new bash session
# .bash_profile
# Get the aliases and funct........
zenity is a nice utility as part of the gnome window manager that allows you to script from bash and retrieve the input from the user. It could also be helpful in just notifying a user when they login with a popup window.
I'll give an overview of what's available with zenity:
Application Options:
--calendar Display calendar dialog
--entry Display tex........
Error reading from database
More information about this error
It is usually not possible to recover from errors triggered during installation, you may need to create a new database or use a different database prefix if you want to retry the installation.
Solution:
This happened when I was running MySQL 5.1. Assuming your database details are right and the DB is up then make sure you are usin........
Almost always the reason will be that the php.so file is missing but also that php.conf is misconfigured.
In the problem machine it is actually PHP7 installed so if you reference PHP5 of course things wil be broken!
Take for example here:
cat /etc/httpd/conf.d/php.conf
#
# PHP is an HTML-embedded scripting language which attempts to make it
# easy for developers to write dynamica........
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/geoip.so' - /usr/lib64/php/modules/geoip.so: undefined symbol: GeoIP_country_code_by_name_v6 in Unknown on line 0
Solution:
Edit geoip.ini
vi /etc/php.d/geoip.ini
Comment out the .so like so:
;extension=geoip.so
service httpd restart........
yes it does create its own json
============================================
cat /tmp/vcsaUiInstaller/ovftool-20180809-175238948-20180809-175603497.log |grep -i json
2018-08-09T17:56:04.238-07:00 verbose OVFTool[30966] [Originator@6876 sub=Default] Manifest file entry: SHA1(VMware-vCenter-Server-Appliance-6.7.0.12000-8832884_OVF10-file1.json) = 1deb658c724767697587d5909c4051c01813e6a1
--> ........
sudo apt-get install libcurl4-openssl-dev git build-essential autotools-dev autoconf libcurl3
sudo apt-get install libcurl4-gnutls-dev
git clone https://github.com/wolf9466/cpuminer-multi
sudo apt-get install cmake libpthread-* libmicrohttpd-dev libssl-dev libhwloc-dev
git clone https://github.com/fireice-uk/xmr-stak-cpu.git
make install
cd bin
chmod +x xmr-stak-cpu
./xmr-stak -O xmr........
[root@thetor2017 conf]# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: WARNING: MaxClients of 3000 exceeds ServerLimit value of 300 servers,
lowering MaxClients to 300. To increase........
Server Side Config
1.) First install nfs-utils
yum -y install nfs-utils
2.) Configure nfs share
Create a directory for your NFS share
mkdir /datastore
Create your NFS share in /etc/exports
echo "/datastore 10.220.101.0/24(rw,sync,no_root_squash)" >> /etc/exports
systemctl restart nfs........
dvd+rw-mediainfo /dev/sr0
INQUIRY: [ASUS ][BW-16D1HT ][3.00]
GET [CURRENT] CONFIGURATION:
Mounted Media: 11h, DVD-R Sequential
Media ID: RITEKF1&n........
I've read a few guides about this but they didn't work for me.
sudo apt-get install bridge-utils
#don't think the above is enough it won't work still even though you have by default an /etc/qemu-ifup that handles it if you have the right tools and setup
sudo qemu-system-x86_64 -net tap -net nic -enable-kvm -cpu host,vmx=on ~/VirtualBox VMs/vsphere-vcenter/vsphere-vcenter.vdi
W: /etc/qemu-ifup: no bridge for guest interface foun........
InternalServerError (com.vmware.vapi.std.errors.internal_server_error) => {
messages = [LocalizableMessage (com.vmware.vapi.std.localizable_message) => {
id = vapi.bindings.method.impl.unexpected,
defaultMessage = Provider method implementation threw unexpected exception: com.vmware.vapi.std.errors.InternalServerError,
args = [com.vmware.vapi.std.errors.InternalServerError]
}],
data =
}
I was getting the........
#mount the VCSA DVD
mount /dev/sr0 /mnt/cd
#alternatively you could mount the iso directly
mount -o loop vcsa.iso /your/mount/path
#for this purpose we are using the CLI installer on Linux
cd /mnt/cd/vcsa-cli-installer/lin64
#no it's not going to be that easy you can't just run vcsa-deploy like that you need to use a template or configured .json file
./vcsa-deploy
Usage: vcsa-deploy [-h] [--version] [--supported-deploymen........
Starting with newer versions of OpenVPN Ibelieve 2.2+ you need to have "script-security 3" set or you can't execute a third party script.
Prior to that you could also use the auth-user-pass-verify like this:
auth-user-pass-verify ./validate.pl "$username $password $ip" via-env
Options error: the --auth-user-pass-verify directive should have at most 2 parameters. To pass a list of arguments as one of the paramete........
The main issue is it looks like Java is not configured to accept the invalid ssl cert that is coming from the download location.
Exception in thread "main" java.lang.RuntimeException: javax.net.ssl.SSLException: java.security.ProviderException: java.security.InvalidKeyException: EC parameters error
export ANDROID_HOME=/home/user/Downloads/tools/
Conversations-master$ ./gradlew
Downloading https://services.gradle.org/distributions/grad........
Centos when copying old files and restarting it seems load everything fine and then says [FAILED] with no log or other message.
service restart named
named [FAILED]
Check more thoroughly you may have missed the error if you have lots of zones!
service named restart|grep error
zone 1.168.192.in-addr.arpa/IN: not loaded due to errors.
zone 2.168.192.in-addr.arpa/IN: no........
This is not the normal "black screen"issue and I was shocked to eventually find out why. The normal advice of reconfiguring Xorg didn't work. Even booting into "Recovery Mode" did not help.
Here is the short end of the stick that fixed it:
sudo apt-get install mdm mate-desktop-environment
Yes you got it right, mdm and the mate-desktop-environment / gnome were somehow uninstalled. This must be whe........
Here is the only solution Ifound that works in Firefox:
*Note you could basically just copy all of the commands in bold (the rest just shows the output)
Install sqlite3
sqlite3 places.sqlite
sqlite> .clone places.sqlite-fixed
moz_places... done
moz_historyvisits... done
moz_inputhistory..........
ValueError: new value non-existent xfs filesystem is not valid as a default fs type
Pane is dead
From what Iread this is misleading and has to do with the fact that the initrd and kernel are mismatched.
This is a hard situation because for some older hardware Iam using the Centos Plus kernel which has modules that Irequire for an older server/NIC. This seems to have cropped up in the past few months and there is no simple fix........
It looks like this has something to do with APIC but I am not sure. I have similar CPUs with a different MB and BIOS that work fine on the same type of kernel. A lot of time the issue is because of the C-step setting in the BIOS.
The same thing happened on the 2.6 kernel with Centos 6 but this is a homebrew 4.4 kernel soI am not sure why it is happening when even Centos 7 (3.2) kernel works OK.
Solution - It comes down to the BIOS set........
In xplayer Iget the following error "Could not initialize supporting library.". It actually looks more like a gstreamer issue.
For those wondering what the default video player is called it is "xvid" and not "totem" anymore like previous versions.
Basically it looks like some codecs are missing when I uninstalled another program it uninstalled other programs and codecs that it shouldn't have.
I've tried installing all the gstre........
In your browser go to "about:config"
Right click and choose "New" ->"String"
The name should be:
general.useragent.override
String Value:
Mozilla/5.0 (Linux; U; Android 2.2.1; en-ca; LG-P505R Build/FRG83) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
You don't even have to restart to make this work.........
One simple way to keep your server public but almost impossible to hack via SSHis to disable password authentication over SSH. This means the only way in is via your own private key that only you should have.
Edit your /etc/ssh/sshd.conf file
Set this option
PasswordAuthentication no
Restart your SSH server.
service sshd restart
........
This is one thing that has me wondering about SMF. It is apparently a known issue but in the latest version and new install nothing looked right because it was using http://127.0.0.1 to find everything! How on earth would it ever do this or think it is normal?
Excerpt of crazy html code it produces that causes the issue:
........
So I have a domain "testdomain.com".
Inside test domain.com's root is the following .htaccess:
Options +FollowSymLinks -Indexes
ErrorDocument 403 /launch/index.html
Order Deny,Allow
Deny From All
Allow From 192.168.1.2
When you visit anything other than root things work fine. Eg. if you visit http://testdomain.com/somedirfile.html
It will show the right error in /launch/........
Just type the command:
localboot
By default it will boot the first local drive "0". Ibelieve you can specify a different number to boot a different device.
eg.
localboot 3
(will boot the 4th BIOS device)'........
It has been a big pain for a long-time to install Windows from a Linux environment. I used to run a windows install server and it never worked right for some reason (the install would fail on most servers).
Before getting start be sure to setup your samba share so once you boot into WinPE you can mount the install for whatever Windows you want
/etc/samba/smb.conf
[smbwinstall]
path = /tftpboot/images/winstall
guest ok = yes........
Normally when I've seen this it's when you are using a variable like a normal string when in fact it's actually an array such as this example:
[Tue Mar 13 04:22:35 2018] [error] PHP Catchable fatal error: Object of class WP_Term could not be converted to string in /vhost/httpdocs/wp-content/plugins/wp-instagram-post/classes/class-woo-igp.php on line 578
&nbs........
Some of the cheaper or newer SSL suppliers will require this to work properly (otherwise you may be prompted that the cert is invalid when it's not the case but it will certainly scare off your users!).
In the Apache vhost conf for the domain here is what you add:
SSLCACertificateFile /path/to/your/cafile.pem
Here is a full example of an SSL Vhost config in Apache using a CA Certificate file
........
Getting this error on Centos 6 with PHP 5.3 when just running "php -v"
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/module.so' - /usr/lib64/php/modules/module.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: Cannot load module 'XCache' because conflicting module 'apc' is already loaded in Unknown on line 0
Solution:........
Centos 6 requires GLIBC 2.12 however a lot of new programs you would want to compile may need a newer glibc. You can't remove the old glibc since the whole OS is based on it but you can install the updated glibc alongside it and do an export pointing to your updated GLIBC.
mkdir ~/glibc_install; cd ~/glibc_install
wget http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz........
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/geoip.so' - /usr/lib64/php/modules/geoip.so: undefined symbol: GeoIP_country_code_by_name_v6 in Unknown on line 0
Remove the GEOIP from PHP:
php71w-pecl-geoip-1.1.1-1.w6.x86_64
PHP Fatal error: PHP Startup: apc_shm_create: shmget(0, 67108864, 914) failed: Invalid argument. It is possible that the........
Stopping httpd: [ OK ]
Starting httpd: httpd: Syntax error on line 221 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/php.conf: Cannot load /etc/httpd/modules/libphp5.so into server: /etc/h........
This just simply outputs what you need a username and password that can be used to authenticate from .htaccess
htpasswd -nb user password
user:Gnb6uE9Lp4gt2
If you want to write it straight to a file
htpasswd -cb /tmp/somefile.pw user password
How To Use This In .htaccess
AuthUserFile /tmp/somefile.pw
AuthName GetLost!!
AuthType B........
In the "last" command in Linux by default it will show the information with the hostname (not very useful at all especially since it normally truncates long hostnames).
To get last to show the IP address use this:
last -i
The -i makes it show the numeric IP instead of hostname.........
yum -y install samba
vi /etc/samba/smb.conf
https://www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-6.03.zip
mkdir syslinux;cd syslinux;unzip syslinux-6.03.zip
mkdir -p /tftpboot/libs/
cp bios/com32/modules/linux.c32 /tftpboot/libs/
cp bios/com32/libutil/libutil.c32 /tftpboot/libs/
cp bios/com32/lib/libcom32.c32 /tftpboot/libs/
#add lib path
echo "PATH libs" >> /tftpboot/pxeli........
By default Samba SMB/NMB listen on ANY and ALLIPs on your system by binding to 0.0.0.0. Obviously this is a huge security risk if you have a public facing server with both internal and external access. Usually when a system administrator sets up a samba server their intention is just to share with a LAN.
To do this you need to the following options under the [global] section in smb.conf
bind interfaces only = yes
interfaces = 192........
tftp: client does not accept options
I spent the good portion of a late evening on this double checking settings that I know always worked right for tftp!
This error can also happen if you are trying to boot PXE in UEFImode. Enter your BIOS and change it to "Legacy PXE" or non-UEFI PXE mode and you'll be good to go!........
Normally lspci will show you just like this and would suggest they are exactly the same card:
1a:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/580] (rev e7)
1c:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/580] (rev e7)
lspci -vnn is the answer
As we can see one is a Gigabyte and the other is an MSI card. Wha........
pcimodules no longer works it produces nothing probably because the format of /sys/bus/pci is different.
lspci -k doesn't work on older lspci versions.
pciutils can be compiled but it won't work if you have an old system and compile on a newer glibc.
iteriate through /sys/bus/pci/devices/*/modalias
cat /sys/bus/pci/devices/*/modalias
pci:v00008086d00001237sv00000000sd00000000bc06sc00i00
pci:v00008086d00007000sv0000000........
edit theme css:
Click "Appearance -> Editor -> Stylesheet"
http://yourblog.com/wp-admin/theme-editor.php?file=style.css&theme=twentysixteen
textarea {
color: #1a1a1a;
/*font-family: Merriweather, Georgia, serif;*/
font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif........
You are using Centos 5 which is deprecated so nothing in yum will work until you follow this post to use the vault:
http://realtechtalk.com/Centos_59_Working_Vault_Repo_file-1921-articles
yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* epel: fedora-archive.ip-connect.vn.ua
Traceback........
This through me for a loop when I would do a cp -rf or mv -f nothing would get overwritten even if piping y or yes to the command.
Type alias and you'll see why:
alias cp='cp -i'
alias l.='ls -d .* --color=auto'
alias ll='ls -l --color=auto'
alias ls='ls --color=auto'
alias mv='mv -i'
alias rm='rm -i'
The -i is a safeguard against messing things up but however does mess things up worse when you know what........
Sep 12 18:16:25 vps pluto[7299]: ERROR: asynchronous network error report on eth0 (sport=500) for message to 192.5.6.2 port 20640, complainant 192.5.6.2: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
Some say changing the "leftprotoport=17/%any" will fix this but I have not found this to be the case.
Essentially it means at least one end is blocking the ipsec packets. Sometimes the %any allows an alt........
Just a note before you do this you should have a sure, guaranteed way into the system such as local, KVMor preferably publickey making bruteforce SSH absolutely impossible since there is no password to bruteforce and even if someone knew the password they wouldn't be able to login except from the local console (presumably you should make sure no one unauthorized has physical access).
1. Edit /etc/ssh/sshd_config
Find the section like this:........
First of all check to see which version if any you have available for a downgrade:
apt-cache showpkg packagename
Downgrade/Install old package:
apt-get install package=version
Example
apt-cache showpkg caja
Package: caja
Versions:
1.10.3-1+rafaela (/var/lib/apt/lists/packages.linuxmint.com_dists_rafaela_import_binary-amd64_Packages) (/var/........
If you were in my boat you were frustrated that you had to double encode, eg. one separate encode for watermark and a separate from concat and it's not easy to figure out this with ffmpeg on your own. However it is a nice way to save time!
ffmpeg -i file1.mp4 -i file2.mp4 -i file3.mp4 -i watermark.png -filter_complex "[0:v]setpts=PTS-STARTPTS[v0]; [1:v]setpts=PTS-STARTPTS[v1]; [2:v]setpts=PTS-STARTPTS[v2]; [v0][0:a][v1][1:a][v2][2:a]concat=n=3:v=1:a=1[v][aout]; [v][3:........
cagecoin linux compile:
sudo apt-get install qt4-qmake libqt4-dev build-essential libboost-dev libboost-system-dev
libboost-filesystem-dev libboost-program-options-dev libboost-thread-dev
libssl-dev libdb++-dev libminiupnpc-dev
Solution:
sed -i s/"BOOST_LIB_SUFFIX=-mt-s"/"#BOOST_LIB_SU........
Solution:
Aptitude is very smart and fixed the issues it was because of nvidia cuda and opencl and nothing else suggested or hinted this using apt
sudo aptitude install wine
The following NEW packages will be installed:
ocl-icd-libopencl1{ab} ocl-icd-libopencl1:i386{ab} wine wine1.6
wine1.6-amd64{a} wine1.6-i386:i386{a}
The following packages will be REMOVED:........
When things go wrong your video is basically unplayable or the first video plays fine and then freezes when moving on to the next. Generally if both videos weren't produced with the exact 100% same settings you will have issues. You can try the basic concat but it often won't work right.
Solution for me:
My example uses 3 videos in total so "n=3" and a=1 to include audio.
ffmpeg -threads 12 -i file1.mp4 -........
I believe from what I've read that this card's driver doesn't support the features after trying all known troubleshooting methods.
ffmpeg -i uservideoRendered.mp4 -filter:v hwupload_cuda,scale_npp=w=1920:h=1080:format=nv12:interp_algo=lanczos,hwdownload -c:v hevc_nvenc -profile main -preset slow -rc vbr_hq -c:a copy uservideoRendered.mp4-test
ffmpeg -i uservideoRendered.mp4 -filter:v hwupload_cuda,scale_npp=w=1920:h=1080:format=nv12:interp_algo=lanczos,hwdownload........
Essentially a program I was running for mining did not terminate properly with Ctrl+C it is listed as defunct and cannot be killed, kernel is tainted and normal tricks to disable the port are impossible the dev and sys entries for the device cannot be browsed or interacted with in any form without a lockup of the request. The only solution is to reboot due to the kernel taint as far as I can find so far.
[1130246.811056] INFO: task minerd:21861 blocked for more th........
#if you have nvidia make sure you install the nvidia-cuda-toolkit so hardware acceleration can be used
wget http://ffmpeg.org/releases/ffmpeg-3.3.2.tar.bz2
tar -jxvf ffmpeg-3.3.2.tar.bz2
cd ffmpeg-3.3.2/
./configure --disable-yasm
install prefix /usr/local
source path ........
This will give you a lot more nice fonts to work with. Usually you must restart the program you are using to see the new fonts.
ttf-mscorefonts-installer fonts-larabie-* ttf-xfree86-* ubuntustudio-fonts ttf-* fonts-*........
Done on Centos 7.3 very important as clearly based on older guides it was a lot easier and more simpler! Hint do not use grub2-install!
If you have trouble booting after this check this CentOS mdadm RAID booting/fixing guide.
One huge caveat if you are an oldschool user or sysadmin who has avoided UEFIbooting
The nor........
user@box:~$ sudo tune2fs -l /dev/md99
[sudo] password for user:
tune2fs 1.42.9 (4-Feb-2014)
Filesystem volume name:
Last mounted on: /mnt/md50
Filesystem UUID: 976a8655-2619-4587-878c-dab07f7b7652
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Fi........
This is a 8TB Seagate external USB 3.0 device apparently newer kernels use a module called "UAS" instead of "USB Storage" which causes issues as a lot of devices are not properly supported in UAS mode by the kernel driver. The solution some say is to disable UAS specifically for your USB device but I'd rather just disable UAS altogether.
Solution blacklist UAS: *do not do this it does not work and just causes your USB 3.0........
I am using a GTX 1060 but replace the download for the driver with the correct/current version for your particular card by visiting: http://www.nvidia.com/Download/index.aspx?lang=en-us
yum install automake curl openssl-devel libcurl-devel gcc gcc-c++
yum -y install kernel-devel-`uname -r`
yum -y install unzip
#the........
When running cudaminer once it tries to initialize the card the entire screen freezes. The computer itself is still running but the Xorg is done for, you cannot even switch to another console window and must reboot (even an mdm or Xorg restart does not help).
At first cudaminer will give you these errors:
stratrum_recv_line failed
...retry after 15 seconds
GPU #0: Geforce 210 with compute ca........
Jun 1 15:45:42 videoeditor-desktop org.mate.panel.applet.MintMenuAppletFactory[1882]: project_data:INFO Missing folder chosen by user:
Jun 1 15:45:42 videoeditor-desktop org.mate.panel.applet.MintMenuAppletFactory[1882]: project_data:INFO Removed missing file: MAH02949.MP4
Jun 1 15:45:57 videoeditor-desktop org.mate.panel.applet.MintMenuAppletFactory[1882]: ui_util:WARNING Icon theme media-playback-start not found. Will use backup........
I was sure this was a Centos bug with OpenSSL, Apache, MySQL or even PHP. I tried everything but nothing helped. One clue is that if you check the Apache logs you will see nothing in the access logs until minutes later (this means Firefox has not even passed your request to the remote Apache/htttpd server).
When even accepting the invalid certificate message that would show up minutes later when trying to "View the Certificate" Firefox would freeze. This bu........
These errors believe it or not are simply because of not being the root user or running with sudo! However if you didn't know to try as root you'd think there was a problem with your burner or disc Essentially it looks like without root you cannot send the required scsi commands to continue writing. Ithink cdrecord should have built-in tests or safeguards to see if it has the permissions to run the required commands.
I guess for more advanced users the idea is simila........
*Update so this doesn't work it must be something to do with the path of nfs or something else but the installer fails with "Installer crashed" at the end whereas with the CD/USB it works.
This assumes you've already installed and configured a separate PXE/DHCP server somewhere else and your /tftpboot directory is setup.
This is for Linux Mint 18.1 but generally applies to most versions although you may have tro change things like "casper"........
Using Apache 2.2 and PHP5.6 PHPBB3 is very slow to respond. Actually for some reason it takes so long to even register a log entry in access_log as in several seconds or a few minutes later it shows up in Apache. All other vhosts and Apache access stops working and freezes until the request to access PHPBB3 slowly completes.
It seems to randomly be slow if you stop using it whether for posting or reading the forums. I've migrated to different machines including........
apachectl -l
Compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
It is "prefork.c" so in httpd.conf these settings are what you would use (if you use worker.c it won't have any impact):
StartServers 2
MinSpareServers 5
MaxSpareServers&nb........
Centos 7 is no cakewalk, there are many fundamental features and basic utilities that are missing or even completely renamed or different!
Another shocking thing is to check your NIC it is set by default to not turn on when booting!
And by the way there is no more standard eth0 the NIC convention is now "enp0s3"
vi /etc/sysconfig/network-scripts/ifcfg-enp0s3........
gpick is a great and simple tool now that I now how to use it
sudo apt-get install gpick
The trick is to find "the swatch"
I was in a rush and was frustrated that it wouldn't work how Iexpected and I had to memorize the hex code of the color my mouse was over.
There is something it tells you to do which is "Click on the swatch area" (click onthe honeycomb graphic area that is the s........
There are usually two reasons for this.
#1 The most common is that you need to enable the -r (recursive) flag with zip to make it recurse into directories.
So the solution is to use -r
zip -r somefile.zip yourfiles
#2 If you are using bash scripting based on ls without the full path or for some other reason the full path is missing, zip looks for the files in the current directory so this will always fail.........
tar -xvJf somefile.tar.xz
It is very annoying that so many are now using the .xz archive format as standard instead of .tar.gz but nevertheless above is how you would extract it with the "J" flag (not lower case j as that is for bz).........
This is especially helpful if you run your own servers. If you are presented with an error message or warning that the signature has changed or does not match the IP/domain you are connecting to you always want to verify manually.
So your e-mail/web client will show you an SHA-1 fingerprint like this:
"Could not verify this certificate because the issuer is unkown" or other reasons such as a mismatch in IP/domain.
It will also show you........
1.) Replicate the number of partitions in your new drives.
gdisk /dev/sda
gdisk /dev/sdb
I created 3 partitions of the same same size.
partition #1: +1G (/boot)
partition #2: +60G (swap)
partition #3: rest of it (/)
#note if you are using GPT/gdisk you need to create separate a partition at least 1MB in size (in my case I would a 4th partition and mark it type ef02).........
The solution is simply "tidy"/Tidy-HTML. It will take your poorly formatted HTML code (and I mean files that span just a few lines that are unreadable) and fix it up.
Note the command below does everything in place. *Make sure you take a backup of all .html files*
It also seems to break html5 code/templates so beware.
tidy -im yourfile.html
An automated way in bash:........
In short the solution is just to use vgremove for the actual /dev/mapper device:
vgremove /dev/mapper/backups-backuplv
box mnt # mdadm --manage /dev/md8 --stop
mdadm: Cannot get exclusive access to /dev/md8:Perhaps a running process, mounted filesystem or active volume group?
box mnt # lv
lvchange lvconvert lvcreate l........
This was a surprising bug but I unplugged all drives for an array md127. At first it was just 1 drive and mdadm seemed to notice this. I unplugged the second drive taking the array offline but mdadm did not realize it was offline and still showed a non-existent disk as being part of it. This created problems trying to unmount it or even to stop this array with mdadm freezing.
As for how to fix it I can only think of making sure you are not in a mounted path of........
Uh oh
[17925926.174277] block drbd0: Handshake successful: Agreed network protocol version 96
[17925926.174325] block drbd0: conn( WFConnection -> WFReportParams )
[17925926.174342] block drbd0: Starting asender thread (from drbd0_receiver [1682])
[17925926.174432] block drbd0: data-integrity-alg:
[17925926.174581] block drbd0: drbd_sync_handshake:
[17925926.174586] block drbd0: self 2AAE66AF9252D6DB:2815BF........
The solution is simple but strange, if you copy your /var/lib/mysql directory to another server and think it will work, be sure to check if you have /var/log/mysql and binary log files. If you do, the server will not work and will give you errors like below and crash without the proper log files.
UPDATE user SET password=password("newpass") WHERE user='root';
flush privileges;
ERROR 2013 (HY000): Lost connection to MySQL server durin........
PHP Fatal error: PHP Startup: apc_shm_create: shmget(0, 67108864, 914) failed: Invalid argument. It is possible that the chosen SHM segment size is higher than the operation system allows. Linux has usually a default limit of 32MB per segment. in Unknown on line 0
PHP Fatal error: PHP Startup: apc_shm_attach: shmat failed: in Unknown on line 0
This error is not at all fun because it actually prevents Apache/httpd from starting or working at all. It will........
service named status
rndc: connect failed: 127.0.0.1#953: connection refused
named (pid 10557) is running...
This issue is normally caused by a permissions issue where named doesn't have the permissions to read the rndc.key.
Check /var/log/messages:
Jan 4 17:06:22 storagebox named[10753]: none:0: open: /etc/rndc.key: permission denied
Jan 4 17:06:22 storagebox named[10........
# yum -y install qemu-kvm
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
* base: mirror.lzu.edu.cn
* elrepo: ftp.utexas.edu
* epel: ftp.jaist.ac.jp
* extras: mirrors.aliyun.com
* openvz-kernel-rhel6: mirror.fdcservers.net
* openvz-utils: mirror.fdcservers.net
* updates: mirrors.nwsuaf.edu.cn
Resolving Dependencies........
It is already known this is not possible
mdadm --create /dev/md3 --level 10 --layout=f2 --raid-devices=2 /dev/sdc1 /dev/sdd1
mdadm: /dev/sdc1 appears to be part of a raid array:
level=raid10 devices=2 ctime=Sat Dec 24 18:44:29 2016
mdadm: /dev/sdd1 appears to be part of a raid array:
level=raid10 devices=2 ctime=Sat Dec 24 18:44:29 2016
Continue creating ar........
sudo fdisk /dev/sdh
WARNING: GPT (GUID Partition Table) detected on '/dev/sdh'! The util fdisk doesn't support GPT. Use GNU Parted.
WARNING: The size of this disk is 8.0 TB (8001563221504 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID
partition table format (GPT).
The device presents a l........
The only way I've found in mdadm to make 2 drives perform like a proper RAID 1 (eg. the read speed should be 2x that of a single drive) is to use the --layout=f2 (far 2).
mdadm raid10 performance issues.
Be very aware that mdadm seems to default to layout=n2 (which means near). In this scenario it means it is like mdadm RAID 1 performance (you get maximum read speeds of a single drive).
dd if=/dev/md126 of=/dev/null bs=1M cou........
The only solution after trying many suggestions was to simply restart the "vz" service (definitely not preferable).
Even doing an ifdown and ifup for venet0 did not help.
ifup venet0
Bringing up interface venet0:
Configuring interface venet0:
net.ipv4.conf.venet0.send_redirects = 0
RTNETLINK answers: Network is down
Some errors from log:
CPT ERR: d2dc60........
Tired of checking iotop and seeing that your drbd partition is using 99.99% of io all the time and finding your drbd device performs slow in general?
This is especially an issue in versions of DRBD in the 8.3 tree in particular one documented case is on "8.3.13" but it likely applies to other devices.
The symptoms are that resyncing is fine and normal but any reasonable amount of activity is very slow and lagged and creates a high server load and con........
We've all done this at some point, you work on the wrong shell window and this was my first time making this mistake but I deleted a partition table in fdisk, recreated it and saved it with "wq" and even ran partprobe! If you haven't rebooted yet then you can still recover your partition table, otherwise you're in big trouble.
Fortunately since it was a live system and in use the kernel still had to use the old table like below:........
I still cannot understand how this would not be enabled by default and I struggled to find the reason why with manually installing samba etc.. wondering why the option for sharing was not in the menu.
On Linux Mint "MATE" the package is called "caja-share" and on Cinnamon it is called "nemo-share" so edit the below command as necessary:
*Also note that the "samba" package is necessary as it is not inst........
This happened while an mdadm array was syncing, all access from writing a new blank file to opening a small .txt file was very slow:
[222117.312078] kjournald starting. Commit interval 5 seconds
[222117.685060] EXT3-fs (md0): using internal journal
[222117.685096] EXT3-fs (md0): mounted filesystem with ordered data mode
[222122.376847] kjournald starting. Commit interval 5 seconds
[222122.602825] EXT3-fs (md2): using internal jour........
Stopping httpd: [ OK ]
Starting httpd: [Wed Jun 29 19:29:44 2016] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Wed Jun 29 19:29:44 2016] [warn] _default_ VirtualHost overlap on........
In Firefox I cannot connect to any website, proxy is disabled and outside network access is confirmed, no system or manual proxy was set on this Linux Mint/Ubuntu system. Normally this can be caused by proxy or DNS problems and the weird thing is that traceroute and ping to other IPs worked fine but even connecting to sites by IP was not working.
The connection was reset
The connection to the server was reset while the page was loading.........
There was only one solution here and it was the following:
edit /etc/httpd/conf/httpd.conf
Comment the lines for the Mime Magic Module:
# MIMEMagicFile /usr/share/magic.mime
# MIMEMagicFile conf/magic
*Don't forget to restart Apache and clear your browser cache twice
I was using DefaultType and ForceType a........
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
No module named yum
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.7.9 (default, Apr 21 2016, 16:51:58)
[GCC 4.4.7 20120313........
For themes and custom CMS setups, the typical HTML theme is not ready to go at all but here are some common sed commands (search and replace that will get most of them working without breaking as you'd expect).
The problem is that often the theme directory will be separate from the content and this will break the relative paths that these themes use.
sed -i s/'href="'/'href="/themes/yourtheme/'/g index.html
sed -i s/'src="'/'src="/themes/y........
At first my BIOS said the card may not work right because there is no more option ROM space.
I disabled the Option ROM for both LSI 1068 and 2008 chipsets, Network Boot ROM and most other PCI slots, Serial Port, etc... and the message went away but the card still does not work properly.
But it still cannot initialize the card properly(does not work):
[ 33.943272] NVRM: This PCI I/O region assigned to your NVIDIA device is invalid:........
Download from here http://www.avagotech.com/products/server-storage/host-bus-adapters/sas-9200-8e#downloads
sudo Installer_P20_for_Linux/sas2flash_linux_i686_x86-64_rel/sas2flash -listall
LSI Corporation SAS2 Flash Utility
Version 20.00.00.00 (2014.09.18)
Copyright (c) 2008-2014 LSI Corporation. All rights reserved
&nbs........
There are a few ways of doing this and all basically involve using the reverse proxy or "ProxyPass" feature of Apache to accomplish it.
1.) Create a normal vhost and simply symlink the root directory of the site you want to mirror.
Eg. originalsite.com and newsite.com
/vhosts/originalsite.com/httpdocs
You would symlink like this:
ln -s /vhosts/originalsite.com/httpdocs vhosts/originalsite.com/........
I modified the default to the following for faster local dialing for North American area codes:
(*xx|[3469]11|0|00 [2-9]xxxxxxS0|[2-9]xxxxxxxxxS0|1xxx[2-9]xxxxxxS0|xxxxxxxxxxxx.)
This is what I added to the above: "[2-9]xxxxxxxxxS0" so any 9 digit number is dialed instantly xxx-xxx-xxxx (the S0 at the end makes it dial right away). This makes dialing much quicker and is recommended.
*No........
1.) Flash directly to this file:
http://tomato.groov.pl/download/K26RT-N/build5x-132-EN/Linksys%20E-series/tomato-E2500-NVRAM60K-1.28.RT-N5x-MIPSR2-132-Max.zip
*I was never able to get the larger "Mega" file to work, at least not initially so I recommend the file above.
To enable 5ghz I had to do the "Clear NVRAM" Option before it was shown.
2.) Or if you don't need 5ghz (most devices do not support it and cannot........
The problem is that the default of most of these units is set for non-North American phones so the ring sounds like it cuts off and is not sequential.
How To Fix the Issue
Click on "Regional" and make sure you are in Advanced mode.
........
Iwill start by saying I think I know what caused this boot-time error on Linux Mint but should also apply to Debian and Ubuntu.
I changed my BIOS time to several hours in the past to match the current time, but this caused Linux to think there were incorrect filesystem times.
The problem is that it seems when you hit this I am not sure what is happening, it doesn't seem to be doing fsck and hangs without prompting the user.
What I have found is that........
apt-get install pptp-linux
echo "yourvpnusername * yourpasspass *" >> /etc/ppp/chap-secrets
vi /etc/ppp/peers/provpnaccounts.com
enter (ignore the lines):
============
pty "pptp server.provpnaccounts.com --nolaunchpppd"
name testuser
#remotename PPTP
require-mppe-128
file /etc/ppp/options.pptp
==========........
The following assumes the computer is local/physical to you and/or it always has a LANIP so it can be accessed on site without having a default gateway.
The key to this is not to set a default gateway for your computer or you can set a script on boot or other time to delete the gateway (where eth0 is the NIC you are using):
route del default eth0
50.80.20.2 is the VPN server you connect to
192.168.1.1 is your........
Cannot register the hard disk '/media/Debian8.vdi' {d01efabc-aacf-4614-b29c} because a hard disk '/home/VirtualBox VMs/Debian/Debian8.vdi' with UUID {d01efabc-aacf-4614-b29} already exists.
This is what happens if you move the VDI to another location.
The easiest way is to delete/remove the machine from VBOX and then reimport it from the new location.........
This command in Debian/Ubuntu/Mint will get everything need installed for most Java based KVM viewers:
sudo apt install icedtea-netx
The following additional packages will be installed:
ca-certificates-java icedtea-netx-common openjdk-8-jre openjdk-8-jre-headless
It seems every other updated version of Java or Icedtea breaks things and I will save the frustration of Java for another post.........
This is useful in the case you are not properly logged in via an OpenVZ session or even a normal SSH session that you fear may go down(if the connection is broken the history is not saved).
Save your bash_history like this:
history -w ~/.bash_history
You can always change the above to another file eg /tm........
Here is the scenario you or a client have a remote machine that was installed as a standard/default minimal Centos 6.x machine on a single disk with LVM for whatever reason. Often many people do not know how to install it to a RAID array so it is common to have this problem and why reinstall if you don't need to? In some cases on a remote system you can't easily reinstall without physical or KVM access.
So in this case you add a second physical or disk or already ha........
The solution was to reinstall the vbox dkms package and do a manual modprobe of the modules it makes.
I never sorted out the unable to start due to the USB issue, I did have the guest additions installed but the only way to boot was to change the pointing device from USB to PS2 and then to disable the USB controller (if your pointing device is set as USB, disabling USB will not work because it will re-enable by default when it sees your pointing device is USB, this is w........
Before reading on remember to put the line at the bottom of /etc/sudoers as from experience what happen is that other rules cancel out what you have added.
If your sudoers setup is correct it will work immediately upon saving without requiring a reboot.
Edit /etc/sudoers
yourusername ALL = NOPASSWD: /path/to/command
*Once again remember the above should be on the bottom of the sudoers file or........
sudo apt-get install zoneminder
[sudo] password for one:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libuser-perl python-evince kdebase-apps kwrite unixodbc
libgnomeprint2.2-data python-soappy vgabios python-metacity hddtemp
python-mediaprof........
[ 2868.041375] ata1: EH in SWNCQ mode,QC:qc_active 0x40 sactive 0x40
[ 2868.041554] ata1: SWNCQ:qc_active 0x40 defer_bits 0x0 last_issue_tag 0x6
[ 2868.041556] dhfis 0x40 dmafis 0x40 sdbfis 0x20
[ 2868.041874] ata1: ATA_REG 0x41 ERR_REG 0x84
[ 2868.042013] ata1: tag : dhfis dmafis sdbfis sactive
[ 2868.042163] ata1: tag 0x6: 1 1 0 1
[ 2868.042301] ata1.00: exception Emask 0x1 SAct 0x40 SErr 0x400000 action 0x6 frozen
[........
Your firefox is out of date if you get errors like below:
Secure Connection Failed
........
yum -y install wget
wget -P /etc/yum.repos.d/ http://ftp.openvz.org/openvz.repo
rpm --import http://ftp.openvz.org/RPM-GPG-Key-OpenVZ
yum -y install vzkernel vzctl
#enable ip_forward
sed -i s/'net.ipv4.ip_forward = 0'/'net.ipv4.ip_forward = 1'/g /etc/sysctl.conf
#all interfaces should not send redirects
echo "net.ipv4.conf.default.send_redirects = 1" >> /etc/sysctl.conf
echo "net.ipv4.co........
root (hd2,1)
Filesystem type unknown, partition type 0x83
grub> root (hd2,2)
root (hd2,2)
Filesystem type is ext2fs, partition type 0x83
grub> setup (hd2)
setup (hd2)
Checking if "/boot/grub/stage1" exists... no
Checking if "/grub/stage1" exists... no
#weird thing about grub is that the drive you enter is considered hd0
For example when booted fu........
If you remove the white label on the chip (near the CMOS battery) you will find the following details about it:
SST 49LF080A 33-4C-NHE
It is the PLCC32 type and can be pried and removed safely (but be very careful) with an eye glass flat head screw driver.
If you just have a bad flash you may be able to reprogram your original or just buy another one with the part# above and reprogram it.
This is great news for people who have bricked th........
so in this case we have files named like this:
track01.cdda.wav.mp3 track06.cdda.wav.mp3 track11.cdda.wav.mp3
track02.cdda.wav.mp3 track07.cdda.wav.mp3 track12.cdda.wav.mp3
track03.cdda.wav.mp3 track08.cdda.wav.mp3 track13.cdda.wav.mp3
track04.cdda.wav.mp3 track09.cdda.wav.mp3
track05.cdda.wav.mp3 track10.cdda.wav.mp3
but we want to rename them so they are like "05.........
[Tue Jun 23 02:05:52 2015] [error] Unable to configure RSA server private key
[Tue Jun 23 02:05:52 2015] [error] SSL Library Error: 185073780 error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch
The above is an accurate description of what is wrong.
In our case the client made a simple mistake of thinking the localhost.crt and localhost.key (default key locations for Apache SSL in Centos) were in the same directory but they we........
#from epel repo
yum -y install opendkim
chkconfig opendkim on
cd /etc/opendkim/keys
opendkim-genkey -vd mail.server.com
opendkim-genkey: generating private key
opendkim-genkey: private key written to default.private
opendkim-genkey: extracting public key
opendkim-genkey: DNS TXT record written to default.txt
........
yum -y install dvdauthor ffmpeg mjpegtools sox bc
rpm -ivh dvd-slideshow-0.8.4-2.noarch.rpm
Preparing... ########################################### [100%]
1:dvd-slideshow ########################################### [100%]
/usr/bin/dir2slideshow: line 553: bc: command not f........
It is very simple and like this to test for the existence of file using bash scripting:
if [ -f /etc/somefile ]; then
echo "yes it exists"
fi........
If a service is not working and resetting it to defaults is not working and you get bizarre error messages it is probably a broken update and possibly duplicate package.
Take in this case "exim" not working even after resetting to defaults.
Check for duplicates:
rpm -aq|grep exim
........
[ 17.208336] tg3 0000:08:00.0: eth0: Link is up at 1000 Mbps, full duplex
[ 17.210194] tg3 0000:08:00.0: eth0: Flow control is on for TX and on for RX
[ 76.000065] phy0 -> rt2x00lib_request_firmware: Error - Failed to request Firmware.
[ 76.002332] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 86.736004] eth0: no IPv6 routers present
[ 148.960038] phy0 -> rt2x00lib_request_fi........
What matters most about VPNproviders in 2024?
We are highly suspicious of VERYLARGE VPN providers that have LOW PRICES and HUGE DISCOUNTS. The suspicion is that for those who know what costs are involved to purchase thousands of IPs and servers are not small. At the prices that many of the big mainstream providers offer, it is likely unprofitable or barely profitable. Then, how are those companies making money or is that even the goal?
There use........
Install the "Flashblock" plugin because we all know most unwanted high CPU usage situations come from the browser usually because of a looping Flash ad taking up 100% CPU.
The solution is to install the "Flashblock" plugin that doesn't allow any Flash to load and play unless you click on the placeholder.........
If the below is happening on KVM (a very weird and scary looking error) it's probably because of Windows. This has happened countless times to me where the bootsector on Windows 7/2008 becomes corrupted easily (even by a crash or shutdown).
KVM: unknown exit, hardware reason 0x80000021
kvm_run returned -22
rax 0000000000000010 rbx 0000000000000080 rcx 0000000000000000 rdx 0000000000000080
rsi 000000000025db2a rdi 000000000007db2a rsp 0000000000000200 rbp........
Account Functions -> Change Site's IP Address
Choose the domain and then click "Change"
Choose the new IP
1.) Setup SSL Certificate in cPanel
Click on "SSL/TLS Manager" under the "Security" section.
2.) Under " Private Keys (KEY)"
Click "Generate, view, upload, or delete your private keys."
Choose "Key Size: 4096........
It's a great feature to ward off bruteforce but is also annoying because you think you have the wrong password when you can't login.
How to Disable cp hulk for 5 minutes
/usr/local/cpanel/etc/init/stopcphulkd........
It is a permissions issue that is hard to fix.
All but one USB device is greyed out.
I am already a member of "vboxusers"
I have already enabled and disabled USB support for the guest.
I have already reinstalled the latest VBOx guest editions
If running as root it all works fine
Changing........
libguestfs tools howto guide for managing virtual machine images.
libguestfs-tools aka guestfs tools has a lot of tools that make this very easy for you. You can easily mount partitons from an image with some of the commands below.
To mount a partition
#mount the kvmuser102821.img image and the /dev/sda1 partition from it to the local directory "mount"
guestmount -a kvmuser102821.img -m /dev/sda1 mount
........
i337 Canada on Bell is hard to root or even install TWRP
Installed TWRP from Odin and my computer gave me the bluescreen at the end but it seemed to be successful (after ODIN said reset).
TWRP mode does not seem to enter, instead you get the Android recovery mode with Volume up + Home
http://galaxys4root.com/galaxy-s4-root/how-to-root-att-or-verizon-galaxy-s4-on-android-4-4-2/
1.)........
This is very annoying and also hard for web developers who want to see how things look on Android. You may be fooled into thinking you have an unclosed bracket or incompatible code but this is the "text inflation feature" which I feel should be disabled by default. It works so inconsitently that one block of text will appear small while the other will be huge and is quite annoying.
The solution is simple
Settings ->Display and &q........
There is a weird quirk with how this works, but there is a variable called "src" that defaults to 0 or disabled if not specified as 1.
The default 0 means not to recur billing on a subscription. It's too bad it's not more obvious anywhere nor is there an explanation or warning during payment or after to both the seller and buyer.
Here's a proper subscription code example that does recur and does not cancel........
This error seems to happen randomly and especially when trying to send e-mails. Apparently it's a long-standing GNome bug but is also partially the default of Thunderbird depending on who you ask. There is no known fix that I'm aware of except to upgrade gnome and the gvfs package but this is not an option for older versions/distributions.
An error occurred while loading or saving configuration information for thunderbird. Some of your configuration settings may not........
CPanel says you can access 98% of the functions through CLI which experienced Unix/Linux admins prefer for simplicity and for scripting. I've never found CPanel easy to use from the admin panel, it seems everything is hard to find and a simple task becomes a series of hunts.
So for people like me here's the list: http://cpanel.net/system-administrators/command-line-scrip........
I've only ever seen this in Ubuntu for some reason and it is because of the /etc/nsswitch.conf settings.
So the issue is that if the hostname's reverse DNS cannot be found that you need to go back to DNS which was not the default in this nsswitch.conf file for some strange reason.
Edit /etc/nsswitch.conf and replace your "hosts" line with this:
#hosts: files dns mdns4_minimal [NOTFOUND=return] mdns........
This can be very tricky, say you are doing development on a file that is symlinked. Doing a "cp dev.file dev.file-bk" won't do what you expect, it just links back to the same file so you haven't copied or backed anything up.
You need the "-H" switch to copy the actual file that is referenced by the symlink:
cp -Hdev.file dev.file-bk........
drbd 8.3 hard drive failure recovery
drbdadm attach r0
DRBD module version: 8.3.10
userland version: 8.3.8
you should upgrade your drbd tools!
0: Failure: (119) No valid meta-data signature found.
==> Use 'drbdadm create-md res' to initialize meta-data area. ........
It is located in /root/.my.cnf
This is truly a horrible idea and a security flaw and on top of that MySQL port 3306 is wide open by default with CPanel.........
After the "latest" update one of our clients asked us to figure out the issue and it turns out it is related to the mail settings.
Basically all e-mails were being sent with blank text/no body.
The solution
Go to "Setup ->General Settings ->Mail" and just click on "Save" and it will work again.
Note that this assumes you didn't break things yourself by changing any settings. WHMCS may tell y........
http://sourceforge.net/projects/apacheoo-deb/files/debian/dists/wheezy/main/binary-i386/
To install AOO on your computer, you need to add the following entry to the /etc/apt/sources.list file:
deb http://downloads.sourceforge.net/project/apacheoo-deb/debian wheezy main
sudo apt-get update && sudo apt-get install openoffice-en* openoffice-brand-writer openoffice-brand-calc openoffice-brand-impress openoffice-brand-base open........
This is what fixed it:
[root@box13 ~]# dd if=/dev/zero of=/dev/md160 bs=512 count=500
Basically you need to wipe out more than just the 512 byte partition table so 512 bytes * 500 is more than enough to make DRBD happy and think the partition is now empty.
The reason this happens is because it gets confused when there is a previous partition with data on the device you are using.
root@box13 ~]# d........
c1: warnings being treated as errors
stonith_signal.h:34: error: 'stonith_signal_set_simple_handler' defined but not used
gmake[3]: *** [apcmaster.lo] Error 1
gmake[3]: Leaving directory `/root/rpmbuild/BUILD/heartbeat-1.2.4/lib/plugins/stonith'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory `/root/rpmbuild/BUILD/heartbeat-1.2.4/lib/plugins'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/root/rpmbuild/BUI........
OpenVZ has made vzctl version 4.7 default to using ploop which is a big annoyance. No one wants it otherwise we'd use Xen or KVM.
Make sure to manually specify vzctl 4.6.1 or you will have issues with old scripts breaking since it defaults to using ploop (a single image like Xen/KVM).
Here's a list to old versions of vzctl.........
fdisk unfortunately can't do this and I'm not sure if there's any updated version that handles it but parted can do it.
Here's an example of how to do it:
parted /dev/sda print
1 17.4kB 1024MB 1024MB ntfs primary
2 1024MB 16144MB 15120MB ntfs primary
/dev/sda1 would be the first partiton
/dev/sda2 would be the second partition
You can then just access them like any other normal partition.........
./configure
./configure: line 91: cd: /lib/modules/2.6.32-042stab084.25/build: No such file or directory
Error: kernel version not found.
Please make sure your kernel is configured.
dr-xr-xr-x. 4 root root 4096 Feb 21 06:13 ..
lrwxrwxrwx 1 root root 45 Feb 21 06:13 build -> ../../../usr/src/kernels/2.6.32-042stab084.25
drwxr-xr-x 2 root root 4096 Feb 12 20........
This seems to mainly affect new installs of Windows and especially on XP randomly.
There are whole pages dedicated to the subject but none of them have a simple proper solution.
They and Microsoft say to use "Microsoft Fix It", the only problem is it requires .NET and many new installs of Windows don't have it by default.
The simple solution you asked for
Just reboot Windows and that is how Ifixed it.........
Iused the slightly older "304.117" version and it worked.
With the newest version Icouldn't get X to start and kept getting these errors in messages/dmesg.
[ 2346.083660] nvidia 0000:01:00.0: irq 44 for MSI/MSI-X
[ 2350.608342] NVRM: RmInitAdapter failed! (0x12:0x2b:1831)
[ 2350.608354] NVRM: rm_init_adapter failed for device bearing minor number 0
[ 2350.608369] NVRM: nvidia_frontend_open: minor 0, module->open() failed, err........
root@hkhosting [/]# service httpd start
Starting httpd: Syntax error on line 2 of /etc/httpd/conf/httpd.conf:
Invalid command 'Alias', perhaps misspelled or defined by a module not included in the server configuration
........
I never found a solution to do it live (nothing worked that I found) so it looks like a relogin is required.
Check your maximum file limit
cat /proc/sys/fs/file-max
824460
This is different than your actual's user limit which you'll see below
ulimit -n
1024
Try and set it higher but it won't work
ulimit -n 65000........
It's not as simple as "yum install" as you can see below and it doesn't stop there.
yum install php53
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* rpmforge: mirror.us.leaseweb.net
* extras: centos.mirror.rafal.ca
* updates: centos.mirror.nexicom.net
* base: centos.mirror.nexicom.net
* addons: centos.mirror.nexicom.net
Setting up Install Process........
I was worried the server was hacked, I was logged in already as root but couldn't login to CPanel or a new SSHsession. I even reset the password from the shell and it did not work still.
The reason is CPanel Hulk, it detected a brute-force attack so it locked down the root account entirely even from the correct password. According to cPanel the best way around this is to whitelist your IP.........
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (720x1280 fourcc=34504d46 [FMP4])
[mpeg4 @ 0x2c91c00] timebase not supported by mpeg 4 standard
Could not open codec.
FATAL: Cannot initialize video driver.
That is the error I would get, I thought it was a codec error something else. By fluke Isaw something about ffmpeg where someone recommended manually telling it to the "fps" and it worked.........
I was having an issue with only certain random/jpeg files with the functions imagecreatefromjpeg imagecreatetruecolor and other related ones.
This issue was annoying basically it seems like a libgd issue/bug with newer versions of PHP and it was difficult to trace-out. One very useful thing that helped me was using "php-cgi" and passing the query string as an argument eg:
php-cgi images.php source=IMG.jpg (that way you get all the error messages wh........
wget http://download-location
sudo tar xjvf thunderbird-24.2.0.tar.bz2 -C /opt
ln -s /opt/thunderbird/thunderbird /usr/bin/thunderbird
[sudo] password for one:
ln: creating symbolic link `/usr/bin/thunderbird': File exists
sudo rm /usr/bin/thunderbird
ln -s /opt/thunderbird/thunderbird /usr/bin/thunderbird
The above is how Idid it, if you don't do it properly you'll find that you are still using the old version (........
wget http://download-location
mv /usr/bin/firefox /usr/bin/firefox-old
sudo tar xjvf firefox-26.0.tar.bz2 -C /opt
ln -s /opt/firefox/firefox /usr/bin/firefox
The above is how Idid it, if you don't do it properly you'll find that you are still using the old version (so verify in About that it is the new version). I've verified the above method works perfectly, it's great if you're using an older version of Linux and need to update the most........
Idon't know why but some installations don't have this in the database by default.
To fix it to an:
sudo apt-get update;sudo apt-get install openssh-server
and then it will work........
Fatal error: Out of memory (allocated 6291456) (tried to allocate 7680 bytes)
This is usually caused by Wordpress, Drupal or other ridiculously inefficient CMS' out there, as a temporary fix you can increase PHP's memory limit but it's best to find the actual culprit, by disabling add-ons and other scripts etc...........
yum -y install fail2ban
vi /etc/fail2ban/jail.conf
[asterisk-tcp]
enabled = true
filter = asterisk
action = iptables-multiport[name=asterisk-tcp, port="5060,5061", protocol=tcp]
sendmail-whois[name=Asterisk, dest=you@example.com, sender=fail2ban@example.com]
logpath = /var/log/asterisk/messages
maxret........
Trying to load: pxelinux.cfg/default
boot: _ (why does the cursor flash so long before entering the PXE Boot menu?)........
./configure
./configure: cannot locate gcc 3.x. please install it or specify with --qemu-cc
yum -y install gcc make
./configure
./configure: cannot locate gcc 3.x. please install it or specify with --qemu-cc
yum -y install compat-gcc-*
./configure
Error: Could not find alsa
Make sure to have the alsa libs and headers installed.
yum -y install alsa-lib-devel
./configure........
On the same OS with the same kernels basically I cannot boot FreeBSD installer, I believe the issue is the host CPU.
One host runs an Intel and works, while an Opteron 2373 does not work despite suggestions from this thread: http://149.20.54.209/showthread.php?t=36761
I've tried cpu options like "kvm64" "Opteron_G3" and none........
mount -o bind /proc /sda2/proc
mount -o bind /dev/ /sda2/dev
mount -o bind /sys /sda2/sys
chroot /sda2
mint / # mount -o bind /proc /sda2/proc
mint / # mount -o bind /dev/ /sda2/dev
mint / # mount -o bind /sys /sda2/sys
mint / # chroot /sda2
mint / # cd ~
mint ~ # ls
Desktop
mint ~ # cd /
mint / # ls
bin Desktop dev-temp home&nb........
./rsync.sh
sudo: sorry, you must have a tty to run sudo
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(601) [sender=3.0.7]
Solution edit
/etc/sudoers
#Defaults requiretty........
tar -czf yourfile.tar.gz .
The . dot is the crucial part, normally many will use * and that will exclude hidden files by default which is very undesirable as many hidden files are important such as .htaccess and conf files in your home directory etc.. It seems the default behavior of tar should be the opposite but these are all very old tools.........
02:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
03:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
Basically these cards are a stripped-down version of Dell Perc 6/i only they (SAS 6/ir) support JBOD.
The DellPerc 6/i are basically useless because it doesn't have JBOD support and requires software or BIOS commands to add or remove........
Iread this article and still don't understand the issue.
If I understand correctly the client negotiates after the first SSLconnection and then gets the correct hostname and thus correct certificate.
http://wiki.apache.org/httpd/NameBasedSSLVHostsWithSNI
To their credit I know I'm not using SNIbecuase Iget this message in the Apache log :)
[warn] Init: You should not use name-based virtual hosts in conjunction with SSL!!
B........
/scripts/phpextensionmgr install PHPSuHosin
Updating md5sum list
Fetching http://httpupdate.cpanel.net/cpanelsync/easy/targz.yaml (connected:0).......(request attempt 1/12)...Resolving httpupdate.cpanel.net...(resolve attempt 1/65)...
Fetching http://httpupdate.cpanel.net/mirror_addr_list (connected:0).......(request attempt 1/3)......connecting to 74.50.120.123...@74.50.120.123......connected......receiving...100%......request success......Done........
relay=alt4.gmail-smtp-in.l.google.com. [74.125.136.26], dsn=4.0.0, stat=Deferred: 421-4.7.0 [ 10] Our system has detected an unusual rate of
This is strange because the mail server IP is not blacklisted anywhere and the IP itself has not been used for years and this server is clean and has only sent a few e-mails to gmail.com in its entire time.
I wonder if this is a legacy block on a whole range of IPs as punishment for others in the block........
I've got one of these for testing projects from work at home and got more than I bargained for with the time I've spent on it due to the storage handing/Perc 6/i cards.
My particular model came with the following:
2U Rack Mount Server with Rails
2xOpteron 2373 EE (Quad Core, there is a 6-core version that can be found at times)
16GB RAM
2 x 250GB Seagate SATA
2 x Dell Perc 6/i (horrible and a nightmare to work........
I bricked one of my cards by following a guide from UNRAID.
Step #1 from them wipes out the BIOS, but guess what? The step where you restore the BIOS should have been done first, which is sas2flash but no version supports or is able to find my Perc 6/i. So now I'm a bit stuck.
I tried using megarec but it's funny that it can wipe the BIOS but can't forcefully reload it:
megarec -writesbr 0 mpt2sas.rom
Supports 1078 control........
LSi Megaraid
At first it was configured as a RAID 0, then I deleted the Virtual Disk Group.
I thought both drives would be shown and detected in Linux as sda and sdb but it actually shows nothing.
To make them work you have to hit Ctrl+R before the system boots (when prompted) and create a Virtual Disk Group. In my case I created each one as RAID 0 (with a single drive only) as I just wanted JBOD but there is no such option or default in these Dell Pe........
rkhunter --update
Running updater...
Mirrorfile /var/rkhunter/db/mirrors.dat rotated
Using mirror http://rkhunter.sourceforge.net
[DB] Mirror file : ERROR
Fatal error: Problem while fetching file
........
CPanel ->Basic cPanel &WHMSetup
At the bottom you'll see them, set the nameservers you want to use and the corresponding A record if needed.
Then all new domains will use those settings/nameservers.
It's strange that there's no section for this specifically.........
The solution is strange but simple and works each time on Centos:
yum downgrade libtorrent........
This is basically URL decoding to the decimal code but nothing in PHPworks how you'd expect it.
Here are online tools to verify and check your work, it's important when querying databases with non-English characters:
http://yehg.net/encoding/index.php#
http://meyerweb.com/eric/tools/dencoder/
http://www.codetable.net/decimal/65398
Japanese:
http://symbolcodes.tlt.psu.edu/bylanguage/japanesechartkatakana.html
Charat code for PHP:........
open /dev/kvm: No such file or directory
failed to initialize KVM: Operation not permitted
[ 96.084502] kvm: disabled by bios
Any of the above means that "Virtualization" is not enabled in your BIOS. Most servers and Desktops (non-mainstream) can do this no problem but leave it off by default. Note that some systems even though the CPU supports it, don't allow enabling of Virtualization for some reason (especially some lap........
This happens all the time, you are reading from a textfile which has spaces eg:
datainfo 00
datainfo 11
If you do loop on it like this:
for info in `cat $file`; do
echo "info=$info"
done
It will treat datainfo and 00 as two separate lines:
info=datainfo
info=00
Obviously that's not what we want and there are many weird solutions in bash bu........
Jul 11 15:20:58 tor sendmail[9617]: r6AKjOD07: to=
mailserver.com was the hostname of the server, sendmail sends this by default and many mailservers will reject mail to a hostname that does not resolve or exist.
The easiest way is just to change the hostname and make sure it does resolve to something.
I read there is a way in sendmail.mc to manually set a hostname but I never got it working:
vi /etc/mail/sendmail.mc
define(`confDOMAIN........
This is important if you need public access to internal IPs such as at your office and don't want to use a VPN just to SSHinto different servers:
Below forwards the port "10001" to the IP192.200.5.53 on port 22 (of course adjust it to your needs).
iptables -t nat -A PREROUTING -p tcp --dport 10001 -j DNAT --to-destination 192.200.5.53:22
Remember to enable MASQUERADE on your NAT IPs or they won't be able to talk to the outside world (........
Crashing with a RAID 1 array and when burning a CD.
Screen goes blank (no video signal) and system stops responding during heavier loads.
Is this a defective power supply or is it possible I have too many devices connected to the same rail?
How can I verify/troubleshoot this?........
Another new drive bad from the start:
Jun 2 15:14:18 one-desktop kernel: [15895.386779] ata2.00: exception Emask 0x50 SAct 0x1 SErr 0x280900 action 0x6 frozen
Jun 2 15:14:18 one-desktop kernel: [15895.386782] ata2.00: irq_stat 0x08000000, interface fatal error
Jun 2 15:14:18 one-desktop kernel: [15895.386784] ata2: SError: { UnrecovData HostInt 10B8B BadCRC }
Jun 2 15:14:18 one-desktop kernel: [15895.386788] ata2.00: cmd 60/0........
This happened to a customer Asterisk server and it somehow found the ID of the registration account to the upstream SIP server and was railing connection attempts (it filled up the console and there were literally thousands per second). Basically this caused all incoming and outgoing calls to fail.
It was a temporary fix but the solution was to block that specific IP, it's hard to stop it 100% because the customer needs the default SIP port.........
This is just trying to read 5GB off the drive with dd and the drive initially tested ok but shortly after I wondered why I was seeing 2MB/s read speeds. Notice the "current_pending_sector", anytime I've seen it at anything above 0 even with no other bad fields/attributes, it means the drive is bad.
ata1.00: exception Emask 0x0 SAct 0x3 SErr 0x0 action 0x0
ata1.00: irq_stat 0x40000008
ata1.00: failed command: READ FPDMA QUEUED
ata1.00: cmd 60/00:00:........
I haven't updated VBOX in ages but have never seen this issue and it has my CPU running at 100C.
Manually/forcefully killing the process does not work with "kill -kill 3892".
I've closed the VBOXManager and everything else related to it.
This did seem to happen around the time I ran VBoxManage clonehd and it failed, the terminal issue locked up and also never wrote a byte of anything. I forced killed the VBoxManage and tried to remove &........
vi /etc/httpd/conf.d/ssl.conf
Change the following from "Listen 443" to something like below
Listen 2243
Then find the SSLVirtual Host Context and edit like below (to your new listening port)
##
## SSL Virtual Host Context
##
........
This is something many people and especially businesses worry about, or at least they should. Before throwing away a hard drive, returning a hard drive, or especially Warrantying/RMAing it, you should wipe the drive.
Linux provides the "shred" and "dd" utlities which work quite well. It seems even a single pass is good enough but by default shred will do 3 passes.
Here's an example of using shred in Linux (I use a custom made distribution from........
smartctl -a /dev/sda
smartctl version 5.36 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
Device: ATA WDC WD1600YS-01S Version: 20.0
Serial number: WD-WCAP03024940
Device type: disk
Local Time is: Mon Apr 29 21:40:07 2013 PDT
Device does not support SMART
Error Counter logging not supported........
If you move your hard drive(s) around to other computers/servers, you'll find that your eth0 keeps getting higher, the first time it will become eth1 and then eth2 etc and even higher if your server has dual or quad NICs. The reason is that udevd basically assigns eth0 tot he first NIC it finds and remembers it, if it encounters a NIC with a differentMAC, it assigns it one higher (eg. eth1).
See the example below, I have eth2 now so how doI fix it?........
This is a handy link and list of all the relevant Directadmin log files and related servers.
http://help.directadmin.com/item.php?id=11
DirectAdmin:
/var/log/directadmin/error.log
/var/log/directadmin/errortaskq.log
/var/log/directadmin/system.log
/var/log/directadmin/security.log
Apache:........
for entity in {1..20}; do
echo "entity=entity"
done
The above will loop 20 times, you could also do {2..50} etc...
for entity in {0..10..5}; do
echo "entity=entity"
done
The above will loop 10 times but will start from 0 and increment by 5 each time.........
Here's a proven example of what a bad hard drive can do, it was technically functioning OKin a RAID array but the system became extremely low and the load become high and IOWAIT was even higher and I always thought it was a bad application. The truth is that this failing 1TBHitachi has slowly gotten worse and caused huge slowdowns, (eg. 100% load on Thunderbird waiting for e-mails to load etc..). After swapping it out, tabs change instantly, emails are not lagged, and........
Step #1 - Create Wrapper Script
vi /usr/local/bin/phpsendmail
#!/usr/bin/php
........
Usually a lot of things don't work right on Linux, but Samsung printers aren't one of them. I used to have a CLP310N that never worked right in Linux, it would print strange lines over pictures or with some programs, no picture at all. I was using whatever the default driver that Ubuntu found.
Now I upgraded to a CLP-365W which is basically the same thing with wireless but no driver from Ubuntu (eg CLP-350) works. I was forced to go to Samsung's site and was surprise........
This pops up when connecting the phone and it doesn't seem to charge. The phone keeps showing a status message every few seconds "Connected as a media device".
It's ridiculous why this phone doesn't just default as a simple USB Mass storage device.
Here's what I see in /var/log/messages:
Jan 30 18:51:27 QuadCoreAM2 kernel: [18038228.144046] usb 1-3: new high speed USB device using ehci_hcd and address 24
Jan 30 18:51:28 QuadCoreAM2 ke........
Tools -> Options -> OpenOffice Writer -> Table
Uncheck "Number Recognition"
This will permanently disable it but won't undo the damage it has already done. I spent a long-time fighting with this horrible feature which should be disabled by default.........
This booting error is because the Xen PV guest image uses the Xen kernel, this is not compatible with anything but a host running a Xen kernel.
I did a kpartx -av virtual.img and then it created some partitions that showed up in fdisk.
I mounted it and did a chroot into it and removed the xen kernel and installed a normal kernel but Xen still shows the same kernel in Grub (only the Xen one).
This is strange but it seems like this Xen PV guest has some sort of hidden or........
Cannot load certificate file keys/server.crt: error:0906D06C:PEM
The .crt is blank empty because when generating it I kept hitting enter for the defaults and this caused the crt not to be signed.
Certificate is to be certified until Dec 18 00:35:49 2022 GMT (3650 days)
Sign the certificate? [y/n]:y
1 out of 1 certificate requests certified, commit? [y/n]y
So if you get messages like these, a........
This is very handy if you're too busy and don't have time to download whatever files you need.
The -D specifies the domains allowed, this is because I specified -H which means foreign hosts are allowed, if you don't restrict them you'll end up going to the whole internet via ads and other links just like a search Engine would follow.
-l 0 specifies to go deep, to as many levels as possible/as exist.
-e robots=off is important because robots.txt often says you can't vie........
This is something I often setup for clients because it's very helpful for people in datacenters, this allows custom OS installs on demand, you can customize it more by using kickstart etc.. but here's a base I use before customizing more:
This little script below will install everything you need to get booting by PXE Linux.
It also assumes you set a local IP (be sure not to overwrite your existing IP) on eth0:0 (note the :0) as 192.168.1.10 and it........
I've used rsync again for this because I found it very simple, I've only excluded the Cache directory since it's not necessary and could be several GB in size.
rsync -Phaz --exclude=Cache/* user@remotehost.com:/home/user/.mozilla/firefox/profile.default/* /home/user/.mozilla/firefox/ec1n9opl.default/
This is a great way once again to get going how you were on the old/remote computer fairly quickly. It even restores all of your history in........
The best way is to use rsync, I've set it up so it doesn't copy unnecessary files, or at least ones I'm sure aren't needed.
Here is the rsync command Iused (adapt to your specific Thunderbird profile location):
rsync -hazv user@remotehost.com:/home/user/.thunderbird/sbrer.default/* /home/user/.thunderbird/4nyb0.default/ --exclude=global* --exclude=Cache --exclude=ImapMail --exclude=Mail
This is a great way to get your e-mail accounts going on a new c........
mdadm --manage /dev/md1 --add /dev/sdb1
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: /dev/sdb1 not large enough to join array
md1's first primary member /dev/sda3 has 57394 cylinders while the /dev/sdb1 has 57393 (1 less cylinder) which is why it won't work.
fdisk -l /dev/sda3
Disk /dev/sda3: 47........
The size of the message you are trying to send exceeds a temporary size limit of the server. The message was not sent; try to reduce the message size or wait some time and try again. The server responded: 4.5.3 Error: too many recipients.
We set this in main.cf:
smtpd_client_recipient_rate_limit=0
We didn't specify it before and the default is said to be 0/unlimited and it still didn't change anything.........
For whatever reason the current OpenVZ yum repo file enables the RHEL6 version of OpenVZ, why is this bad? Because if you're running Centos 5 it still defaults to using the kernel from RHEL6 which won't work on RHEL5/Centos 5.
Ionly realized this after wondering why I couldn't boot into OpenVZ that it was using one meant for RHEL6.
To fix the problem you have to edit /etc/yum.repos.d/openvz.repo and disable the "[openvz-kernel-rhel6]" section by changing........
ip_conntrack: table full, dropping packet.
A lot of clients I've seen have this issue, it really seems the default level is way too small. Once this connection tracking table becomes full then packets get dropped which is obviously a bad thing.
One thing to be mindful of though is that 350 bytes of memory are used per entry so there is some justification for not keeping it too high. However, if you have multiple servers running or high traffic daemons........
A lot of people become nervous (and understandably so) when checking their auth or security logs, in Centos /var/log/secure and see dozens, hundreds of even thousands of attempted logins to various services, especially SSH.
Of course you could manually block these people/IPs but no one has time to read the logs like that, what if some program or script could do it for you?
This is what denyhosts does for you, it checks the logs and based on a certain number of failed SSH attem........
I backed up everything in the /mnt/sd_card directory thinking that some dataloss could occur for some reason but purposely left my microSDHC unbacked up thinking that "it won't touch that since it's external" and Samsung's and other manufacturers website even say this (that it won't be affected and not to worry etc).
Apparently I was wrong, my microSD was "undetected" and asked to be formatted after the upgrade (there goes 3-months worth of family photos). No........
This may sound silly but there will be conflicts/issues with the default Centos repository so you have to use a third party like remi (I prefer not to do this but it's the only option unless you migrate your sites/data to another server or can stand some downtime-not an option IMHOon a production server).
You may need to upgrade to PHP5.3 to run Joomla or many other reasons.
Your host needs to use PHP 5.2.4 or higher to run this version of Jo........
The best way I could figure out is to use another guest of some sort to do this, while assigning the disk that needs to be resized to the same guest.
So say we have /dev/xvda as the guests drive and we've booted it up.
We also have /dev/xvdb (this is going to be the image/disk to be resized).
In this case it's based on an ext3/4 image.
Run e2fsck on it to ensure there are no filesystem errors.
e2fsck /dev/xvdb........
Disk /dev/sda: 320.0 GB, 320072933376 bytes
256 heads, 63 sectors/track, 38761 cylinders
Units = cylinders of 16128 * 512 = 8257536 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 38........
Neither the blkid or the UUID internal to mdadm work to automount for some reason in Debian
partprobe doesn't work but was a good suggestion from: http://pato.dudits.net/2008/11/03/special-device-uuidxxxxxxxxxxxxxxxx-does-not-exist-especially-with-lvm
mount: special device /dev/disk/by-uuid/431b9b96-29e8f298-e89bd504-7065bddd does not exist
mdadm -D /dev/md_d12
mdadm: metadata format 00.90 unknown, ignored.
/dev/md_d12:
&nb........
I am running a 64-bit host and was running a 32-bit XPguest which was crawling no matter what I was doing with it,in fact it frequently used 100% CPU power while having no real work load. I experienced with this other guests and wondered why KVM was slow compared to say Xen or Virtualbox.
This is because you need to use the "-cpu" flag.
For a full list of options run:
/usr/libexec/qemu-kvm -cpu ?
x86 ........
After about 15 tabs I believe, they become hidden on the right side and are accessible only by furiously clicking the "right arrow" and even then it takes forever and honestly this hidden tab feature seems to slow down everything.
If you enter "about:config" in your browser without the quotes just set this value to get rid of this annoying (one of many new) feature from Firefox (set it to false and restart your browser):
services.sync.prefs.sync.brows........
So you've just purchased your SSL cert, renewed it and installed it or maybe you've had it installed and working fine all the time with all other browsers but you've upgraded to a recent version of Firefox and suddenly get the warning "Error code: sec_error_unknown_issuer" error.
This is terrible since if you bought an SSL cert, you are most likely using it for trust purposes for your business and obviously that message will scare away most potential customers.........
I searched for days after getting my Galaxy Note and couldn't find a way to do this (at least not without buying programs for either Android/Windows). All I read was ways to sync and import the contacts to GMail but I don't want to use GMail for privacy reasons. GMail/Google steal all of your personal information and use it for whatever purposes they want to and may sell or release it to who knows where (I don't care what their policy says but this stuff happens), just like the default........
It's really silly how DA doesn't enable SSL by default but is otherwise a stable, fast and secure control panel.
Here's a copy and paste way of enabling SSL for Directadmin in just a few seconds:
*setup SSL
openssl req -x509 -newkey rsa:1024 -keyout /usr/local/directadmin/conf/cakey.pem -out /usr/local/directadmin/conf/cacert.pem -days 9999 -nodes
That creates the public certificate and private key pair in the location Directadmin expects to fi........
I experienced this with CPanel's Exim after an auto-update (a Google of this error produces lots of complaints with few clear solutions). In this case I'll put the solution at the top.
Run /scripts/buildeximconf to rebuild the Exim config and it should be fine after that.
mail -vs "from test" user@dest.com < .bash_history
LOG: MAIN
cwd=/root 4 args: send-mail -i -v user@dest.com
LOG: MAIN
&........
Type "about:config" in your browser and then search for "Quit"
Set these values to true
browser.showQuitWarning
browser.warnOnQuit........
In Firefox type "about:config" in the address bar.
Search for "browser.urlbar.trimURLs;false" and set it to true, then you'll have the http:// and https:// back.
Firefox talks about the greater good but unless they don't care about security why would they hide if the url is secure or not?........
For years I've always built cheap systems believing that there is little difference in more expensive components when it comes to reliability and quality, I generally believe this still except for Power Supplies.
I've always bought cheap cases with nice sounding 350-550W stock/cheap/crap power supplies and haven't had any issues for the most part until recently.
One such case is an NGEAR case with a 550W Optimax power supply, I always read that these supplies don't produce the........
I've thought for awhile that Asus has been banking on its years old reputation for quality amongst gamers and enthusiasts and I think I'm right. My Asus VE247H Monitor with a supposed 2MS refresh rate has 1 red/stuck/dead pixel but fortunately it can only be seen on a non-true black picture or against a blue screen.
I have several Asus products and find they're all of fairly poor quality. First of all their motherboards have given me the most issues of any brand, they te........
When double clicking nothing happens/it doesn't open and when executing as ./firefox-bin you get this error:
./firefox-bin: error while loading shared libraries: libxul.so: cannot open shared object file: No such file or directory
All the .so files reside within the directory of Firefox that you extract from the binary .tar.gz from Mozilla, it's just that your computer doesn't know/recognize where to look for them.
Solution:........
I'm running Ubuntu 10.10 with Asus NVIDIA GT430
2.6.35-32-generic-pae #65-Ubuntu SMP Tue Jan 24 14:06:16 UTC 2012 i686 GNU/Linux
Nvidia binary driver: 260.19.06
The screen sometimes completely freezes and locks up or everything starts going very slow:
[1903398.100007] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context
[1903402.373210] NVRM: Xid (0001:00): 53, CMDre 00000000 00000080 00000000 00000005 00........
fdisk -lu VPS.img
last_lba(): I don't know how to handle files with mode 81ed
You must set cylinders.
You can do this from the extra functions menu.
Disk VPS.img: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders, total 0 sectors
Units = sectors of 1 * 512 = 512 bytes
Device Boot Start End ........
This is what I call a ridiculous bug in compiz that causes it.
The solution/To fix it just install "compizconfig-settings-manager"
Open it up and Navigate to General Options -> Display Settings
Set the "Refresh Rate" to the current refresh rate of your monitor.
For ATI cards with slow window dragging/response supposedly disabling "Sync to VBlank" fixes that but otherwise leave it as is.........
Stuff like this always happens/breaks after a vzctl update, whether it's new parameters being added or required etc..
File /etc/vz/conf/ve-vps.basic.conf-sample not found: No such file or directory
Fix the value of CONFIGFILE in /etc/vz/vz.conf
Creation of container private area failed
Warning: distribution not specified in CT config, using defaults from /etc/vz/dists/default
WARNING: /etc/vz/conf/4400.conf not found: No such file or directory........
I dread updating the kernel and rebooting to find the Ubuntu graphics aren't working and you have to manually intervene. This is usually because Ubuntu for whatever reason didn't update the drivers you need (eg. the manually compiled Nvidia Kernel driver that MUST be recompiled for each and every kernel update unfortunately).
The most common reason may be that "linux-source" hasn't been installed automatically on my system. I tried to manually reinstall the........
It really is as simple as:
cdrecord -v dev=/dev/sr0 pathtoyourisoimage.iso
-v is for verbose, I prefer it but if you don't you won't see as much output like below (I like to know the details and exactly what's happening)
dev=/dev/sr0 specifies the device name of your burner (they say not to use it and to specify some weird annoying device string but using the raw /dev has always worked for me and is how it should have been implemented from the start IMHO)........
The first Hitachi Deskstar 2TB 5K3000 drive I bought arrived DOA for whatever reason (not recognized by the BIOS or OS). Perhaps it was shipping since I bought only 1 hard drive. When I bought 4 through another Vendor, all 4 checked out fine.
I was worried about the RMA process because a lot of people have complained about Hitachi taking weeks to send out their hard drive and almost implied the warranty is useless.
I'm happy to report that my experience was great a........
Within vi if you can't exit /etc/vim/vimrc you can type
:syntax off
And to turn it back on:
:syntax on
Many of us have a dark/black background in our terminal/shell making the default syntax unreadable, the solution is to either turn off syntax highlighting with :syntax off or to enable a special option in /etc/vim/vimrc
Edit /etc/vim/vimrc
The "syntax on" enables the highligh........
It may be hard to find by Googling by it's really quite simple and quicker than reading dozens of man page entries.
sed -n 5p somefile.txt
Just replace the 5 with whatever line you want to be printed.........
Have you ever found a website/page that has several or perhaps dozens, hundreds or thousands of files that you need downloaded but don't have the time to manually do it?
wget's recursive function called with -r does that, but also with some quirks to be warned about.
If you're doing it from a standard web based directory structure, you will notice there is still a link to .. and wget will follow that.
Eg. let's say you have files in http://serverip/documen........
I had a system running a 128MB live CD image with 2.8 gigs of available RAM and the OOM kernel killer went crazy when using dd for more than 8 minutes and kept killing everything. I've read that this is due to a low-memory issue and paging in the kernel and 32-bit systems with lots of RAM.
I even enabled swapspace on my LiveCD and the issue happened 25 minutes into dd rather than 8 minutes, so what gives?
Also no swap space was ever used!
cat /proc/s........
I like dd, although it only reads it, usually a read test of the entire disk will uncover if your hard drive is bad in some parts. This is a good thing to do at least once a month, a lot of times bizarre program behavior, laginess and crashing/unnmounting problems etc.. are due to a failing disc and SMART won't know it or indicate a problem:
We must also remember there's never a guarantee, I've found that ever since we moved to larger and more platters per drive with 1TB drives........
I had one of these shipped and it was not recognized when plugged in, here's what a dead drive looks like (I assume it's teh circuit board which is dead):
ata1: link is slow to respond, please be patient (ready=0)
ata1: softreset failed (device not ready)
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1: link online but device misclassified, retrying
ata1: link is slow to respond, please be patient (ready=0)
ata1: softreset f........
This assumes that you've at least created the correct partition for your DRBD already.
Notice that I am "diskless", that's because either your DRBD partition doesn't exist/has been renamed (eg. sdb becomes sda when sdb dies and you reboot) or because that drive is really actually dead/gone.
*If you need to permanently change the partition/device for your resource be sure to edit /etc/drbd.conf on both hosts and reload the config.
(replace r0 with........
I thought only a faster CPUand SSDwould help but I already have a Quad-Core CPU and it wasn't being maxed out. The actual tests were performed on an AMD-V enabled 128MB dual core VMWare container though.
There is a flag that can be passed to make in order to start multiple threads, by specifying 4 threads I was able to reduce the whole kernel compilation time from scratch by about 50%! (65minutes vs 31minutes!). *Yes I did do a make clean before each co........
One thing to note about DNS servers and providers is that they aren't always trustworthy, not even if they're Google or your favorite ISP. Any DNS server can compromise your privacy, and they are likely tracking your browsing habits and keeping logs of it. Sometimes it's for Marketing/Research purposes such as Google's GMail service which they admit is scraped/datamined. I would expect nothing less from their DNS service.
The other danger with such widely used and pu........
(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
This will even trip you up if you have a service like monit to save you if httpd crashes. The only way to fix this is to either wait (it's not an option for production situations) or to kill the ghost httpd processes that wouldn't gracefully close:
So........
Virtualbox hang problem
A VM just froze and wouldn't close so I had to force it, but the VBox GUI thinks it's running even when I close it.
I manually killed the related process by doing ps aux|grep VirtualBox and found the PID 6191
I killed it with "kill -kill 6191" but it remains open and as "defunct" so I can't restart it because the GUI freezes when I click on it because it thinks it is running still........
mod_status is a great way to track down the source of high CPU usage and to find what vhost/script is the cause of it.
It gives you a live view of bandwith usage, CPU usage, and memory usage broken down by domain/vhost and script/URI.
Enable mod_status
vi /etc/httpd/conf/httpd.conf
ExtendedStatus On
SetHandler server-status
Order Deny,Allow
Deny from all
All........
yum -y install vnstat
chown nobody.nobody -R /var/lib/vnstat/
#replace venet0 below with your desired interface
sudo -u nobody vnstat -u -i venet0
#edit: vi /etc/sysconfig/vnstat
#VNSTAT_OPTIONS="-i venet0"
# only use the sed below if you are using venet0 instead of eth0 or replace accordingly
sed -i 's/eth0/venet0/g' /etc/sysconfig/vnstat
[root@monitor]# yum install vn........
smartctl -t long /dev/sda (note you can specify short, but it's not as thorough as long of course).
smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION ===
Sending command: "Execute SMART Extended self-test routine immediately in off-line mode".
Drive command "Execute SMART Extended sel........
You need to enable the httpd daemon with monit to actually view the status and control, it's not only for the web interface since the httpd is theONLY way of controlling monit and viewing the status.
monit monitor all will also reinstate disabled services if they've timed out too much. Just restarting the service will do nothing to re-monitor a service that monit has stopped monitoring due to too many failures.
*Also note that /etc/monit.conf i........
drup 6.2 install
$cd drupgoodinst3883/
[ drupgoodinst3883]$ ls
CHANGELOG.txt cron.php index.php INSTALL.pgsql.txt INSTALL.txt MAINTAINERS.txt modules robots.txt sites update.php xmlrpc.php
COPYRIGHT.txt includes INSTALL.mysql.txt install.php LICENSE.txt misc&........
I don't expect this to be solved soon but some of Yahoo's DNS servers are out of whack. I changed the IPs of some nameservers of some domains and now most Yahoo users can't e-mail to those domains!
As you can see below by the "No MX or A records for mychangedomain.com", now Yahoo's DNS/mailserver DNS cache is wrong. You would think they would at least have cached the old incorrect records, but instead for some reason their DNS cache has no entry and doesn't seem........
high IO wait
424 root 39 19 1900 848 552 D 0.0 0.0 0:00.91 updatedb
root 424 0.0 0.0 1900 848 ? DN Mar11 0:00 /usr/bin/updatedb -f sysfs?rootfs?bdev?proc?cpuset?binfmt_misc?debugfs?sockfs?usbfs?pipefs?anon_inodefs?futexfs?tmpfs?inotifyfs?eventp........
/tmp/J_5JHKXU.bin.part could not be saved, because the source file could not be read.
Try again later, or contact the server administrator.
This is actually not a download problem related to the server/site you're using but actually some weird bug with Firefox. I know because no matter what site I tried to download from this error kept happening.
Simpy restarting Firefox was enough to get things working again.........
Virpus Review/Scam/Complaint
Virpus is advertised on LEB (lowendbox.com). My initial payment was refunded after days of not receiving the VPS, but two subscrption payments went through and Ionly received notification after the second one. They ignored the requests in the ticket and by e-mail for a refund and even escalated the PayPal dispute that "we're assuming this is for a service that was provided" (when they obviously know otherwise by........
There are all kinds of threads and links on the internet, and this seems to be a contentious issue butI don't know why.
95th percentile is either a good deal for some or a big rip off for others, Ijust said it there :)
But the reality is that for MOST people who transfer low amounts of data but burst to higher speeds such as 40mbit+ even for short periods of time, then you'll pay a lot of money to do that.
Basically 95th percentile is an-old archaic method........
find what MPM Apache is using, it will either be using "worker" or "prefork"
apachectl -l
Compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
In my case it is "prefork"
vi /etc/httpd/conf/httpd.conf
Find the section that looks like this (by default one will normally exist for prefork and for worker, but in my case I only care a........
*Remember to restart spamassassin after all of this.
DCC
wget http://www.dcc-servers.net/dcc/source/dcc.tar.Z
tar -zxvf dcc.tar.Z
cd dcc-1.3.138/
./configure;make;make install
#enable DCC, uncomment the line that disables it near the top
vi /etc/mail/spamassassin/v310.pre
pyzor
wget http://sourceforge.net/projects/pyzor/files/pyzor/0.5.0/pyzor-0.5.0.tar.gz/down........
These are the only two I've encountered but here is the low-end and note my story is not at all unique.
In my case I was scammed out of money and did not receive any service at all from either company.
Santrex Review/Scam/Complaint
Santrex never provided any working server, I believe it was just a dummy management Solus server because the server said it was booted but never connected to the console. I complained to them and eventually the support adm........
Centos 5 Postfix and SPAMASSASSIN Tutorial
yum install spamassassin
chkconfig spamassassin on
vi /etc/mail/spamassassin/local.cf
##############
#required_hits 5
#report_safe 0
#rewrite_header Subject [SPAM]
#5 is the least restrictive (means only the most obvious SPAM is caught. 0 is obviously the most restrictive/sensitive and would have lots of false positives
require........
SPAMASSASSIN
Disable OpenWhois RBL (it is dead/defunct/no longer active):
You might see this in your headers
2.4 DNS_FROM_OPENWHOIS RBL: Envelope sender listed in bl.open-whois.org
comment out this inside /usr/share/spamassassin/72_active.cf
##{ DNS_FROM_OPENWHOIS
ifplugin Mail::SpamAssassin::Plugin::DNSEval
header DNS_FROM_OPENWHOIS eva........
ls
ls: error while loading shared libraries: libtermcap.so.2: cannot open shared object file: No such file or directory
This is not an ldd problem or case of anything missing, this only happened after I upradedUbuntu.
declare -x PATH="/home/user/bin:/usr/local/bin:/usr/bin:/bin:/usr/games"
"/home/user/bin" is the problem! It's weird because I have no idea how it happened.........
I right clicked all applicable cells and chose "number" but that's enough.
I notice when I click the cell there is an invisible ' in front of the number:
'33.64
Calc imported my CSV and decided to add a ' in front of the numeric currency values!!!*Actually the problem occurs when you right click the cells and change the type from text to number, no matter what format you choose.
If I change it to be currency i........
Convert MBOX Mail files into Maildir using Linux
*You need perl an the TimeDate module
Get the free Perl script mb2md from the project/author's site:
wget http://batleth.sapienti-sat.org/projects/mb2md/mb2md-3.20.pl.gz
gunzip mb2md-3.20.pl.gz
#remember you need timedate or you'll get this error:
./mb2md-3.20.pl
Can't locate........
Basically you should always be 100% sure that whatever IPyour mail server sends out with has reverse DNS/PTR records. Remember that unless you own your IPs then you won't be able to set your own reverse DNS. Even if you were to create a reverse PTR record on your DNS servers it will be ignored. Reverse DNS is queried to pre-assigned DNS servers of your ISP, so therefore you'll need to contact your ISP/Colo/Hosting provider to do a reverse DNS entry.
If you don't have........
Many people aren't aware but recently Dual-Master Replication setups have become increasingly popular. That's because you get similar features and benefits of having a full-blown cluster (difficult to setup and maintain and requires I believe 3 servers just as controllers).
With a dual-master you just have a different off-set for the keys and you should be good, but of course there is the chance that at some point replication will halt because of an unexpected or unforseen error........
Dovecot enable SSL (by default it uses an old expired cert if you choose pop3s and imaps as protocols)
===================
Create Cert & Key:
openssl req -new -x509 -nodes -days 1530 -out server.crt -keyout server.key
mkdir /etc/mailssl
chmod 700 /etc/mailssl
cp server.* /etc/mailssl
Edit /etc/dovecot.conf
ssl_cert_file = /etc/mailssl/server.crt
s........
I think this will be useful to others because I have a server that kept crashing mysteriously during intense disk usage/RAID checks. It would only crash during the weekly RAID integrity check.
ThenI noticed during a reboot that not all CPUs were being brought up, as a result this actually creates much higher temperatures with the output I got from sensors, just booting the system produced higher than normal temperatures.
You can imagine that a full blown RAID check........
understanding /etc/aliases
*remember to apply changes you need to run "newaliases" after editing /etc/aliases
one thing I don't get is that it doesn't allow you to specify the whole e-mail address on the left-hand side
eg:
yourfullemail@domain.com: someotheremail@domain.com
postalias: warning: /etc/aliases, line 109: name must be local (if you try the above)
It works more like this:
your........
genuine.com/IN: loading master file genuine.com.zone: file not found
_default/genuine.com/IN: file not found
I always found it silly that no one really talks about this and apparently many like me and even control panels like Plesk were still using hard paths. I always thought "why can't I just specify the name of the zone file and have bind find it". Surely the default search path must be /var/named or somewhere else but there is no such thing.........
CPU/Kernel/MB/RAID problem?
Jan 5 12:45:05 testbox kernel: [653298.890004] BUG: soft lockup - CPU#0 stuck for 61s! [hal-acl-tool:4168]
Jan 5 12:45:05 testbox kernel: [653298.890005] Modules linked in: vmnet vmci vmmon binfmt_misc drbd video output input_polldev ocfs2_stackglue ocfs2_dlmfs ocfs2_dlm ocfs2_nodemanager configfs k8temp hwmon_vid lp snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi........
php won't work with absolute links
Warning: imagecreatefromgif(/images/header.gif): failed to open stream: No such file or directory in /vhostsdir/httpdocs/images.php on line 15
That is how my path is structured and ONLY likes the true full path as /vhostsdir/httpdocs/images/header.gif
Why can't it work relative to the vhost directory with absolute links just like say an html link would.........
Apache/httpd
Failed to save enabled features : The Suexec command on your system is configured to only run scripts under /var/www, but the Virtualmin base directory is /home. CGI and PHP scripts run as domain owners will not be executed.
This is because I never edited the Apache Config and Virtualmin config to reflect my new/current updated structure.........
VMWare bridged adapter not working:
Message from system: The network bridge on device vmnet0 is not running. The virtual machine will not be able to communicate with the host or with other machines on your network. Failed to connect virtual device Ethernet1.
I'm not sure how to fix this but one of the issues is that my eth0 became eth1 after moving my hard drives to a new motherboard. I have run the vmware-config.pl but this did not resolve the issue.........
PHP Fatal error: Call to undefined function mysql_connect()
yum install php-*........
Webmin Setup Centos 5:
wget http://downloads.sourceforge.net/project/webadmin/webmin/1.530/webmin-1.530-1.noarch.rpm?r=http%3A%2F%2Fwww.webmin.com%2Fstandard.html&ts=1294339690&use_mirror=surfnet
[1] 24229
[2] 24230
[root@host ~]# --2011-01-06 21:48:20-- http://downloads.sourceforge.net/project/webadmin/webmin/1.530/webmin-1.530-1.noarch.rpm?r=http%3A%2F%2Fwww.webmin.com%2Fstandard.html
Resolving downloads.sourceforge.net... 216.34.181.........
I can't tell if it's Flash or Javascript that they were using, but it basically caused my sysetm to lockup until I closed that one page. Is this proof enough that Wal-mart is evil?:)
I've never seen that before, it's weird how certain things mask themselves as high CPU usage with Xorg, unless it is some kind of weird Xorg problem but I believe it's more of a Flash/Javascript issue from Firefox in Wal-mart's evil scripting.........
This doesn't seem to be widely known (maybe it's in some documentation that none of us read though)but there's an easy way to check the integrity of any mdadm array:
sudo echo check > /sys/block/md0/md/sync_action
-bash: /sys/block/md0/md/sync_action: Permission denied
sudo will never work, this only works as root since echo is not actually a binary/command. It is built-into bash.
/sys/devices/virtu........
This really made me nervous but notice the mdstat says "check". This is because in Ubuntu there is a scheduled mdadm cronscript that runs everyday on Sunday at 00:57 that checks your entire array. This is a good way because it prevents gradual but unnoticed data corruption which Inever thought of.
As long as the check completes properly you have peace of mind knowing that your data integretiy is assured and that your hard drives are functioning properly (I'........
What this really refers to is gnome-volume-control-applet which is what controls the volume in the panel/indicator applet.
In Ubuntu 10.04 it is just the applet mentioned above, run that from the command line and it will start.
I lost mine when I removed pulseaudio trying to fix audio issues with Flash and Opera. It also removes the gnome-volume-control-applet from starting. *Ialso note........
I've only used it on Centos, soI thought I'd make a quick Debian guide:
Install the DRBD Package
apt-get install drbd8-utils
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libswfdec-0.8-0
Use 'apt-get autoremove' to remove them.
The following........
VMWare log: /var/log/vmware/hostd.log
SSL Handshake on client connection failed: SSL Exception
sudo /etc/init.d/vmware-mgmt restart
Stopping VMware management services:
VMware Virtual Infrastructure Web Access
VMware Server Host Agent&nb........
I'm mentioning this because I keep forgetting what port the management is on for the web interface (since newer releases of VMWare server took away the superior stand alone client).
So remember it is port 8333 and sometimes you need to restart vmware-mgmt service and also enable sslv2 in your Firefox or it won't connect.........
For many reasons you may be dealing with a standard text file and you want to know if there are any duplicate lines:
Here's how you do it:
cat filename|uniq -c
The "uniq -c" program counts how many time each line occurs.........
Refusing to automatically import keys when running unattended.
Use "-y" to override.
When using echo y|yum install gcc
Fix with rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY*........
I separated the 2 drives in the RAID 1 array.
1 is the old one /dev/sda and is out of date, while the separated other one /dev/sdc was in another drive and mounted and used with more data (updated).
I wonder how mdadm will handle this:
usb-storage: device scan complete
md: md127 stopped.
md: bind
md: md127: raid array is not clean -- starting background reconstruction
raid1: raid set md127 active with 1 out of 2 m........
Let the numbers speak for themselves, from what I read the Load_Cycle_Count which is very high (more than 500,000/half a million times) is the number of head parks. What a stupid"Green" design and design flaw which will probably mean an early life for the drive.
This is almost as silly as Seagate's new reputation for BSY/poor quality disks since the 7200.11 series.
To make it worse this is also when Western Digital introduced "Advanced Format" o........
This is an easy fix and highlights a huge issue again with Linux and Flash still not playing nicely/working as well as Windows yet.
Solution - Go to "about:config" and disable the two entries (set them to false):
dom.ipc.plugins.enabled.libflashplayer.so
dom.ipc.plugins.enabled.libnptest.so........
Nov 29 20:17:58 ubuntu kernel: [ 1157.180789] md: md1 stopped.
Nov 29 20:17:58 ubuntu kernel: [ 1157.180829] md0: unknown partition table
filesystem not responding/reading properly with du or rsync (this needed an fsck).
[ 2571.489217] EXT3-fs error (device md2): ext3_lookup: deleted inode referenced: 35923106
[ 2571.942299] EXT3-fs error (device md2): ext3_lookup: deleted inode referenced: 35923110
[ 2571.9568........
Moving to RAID was a pain.
What you have to do is the following from an existing install:
Install mdadm
Create your mdadm RAID 1 array on your spare hard drive.
Start it with the missing disk.
rsync the entire contents of your current / to the md partition.
Here's a good way of doing it:
rsync -Pha --exclude=/proc/* --exclude=/sys/* --exclude=/mnt/* /. /mnt/md2........
nautilus-gksu - privilege granting extension for nautilus using gksu
nautilus-sendto - integrates Evolution and Pidgin into the Nautilus file manager
nautilus-share - Nautilus extension to share folder using Samba
nautilus-actions - nautilus extension to configure programs to launch
nautilus-bzr - Bazaar (bzr) integration for nautilus
nautilus-cd-burner - CD Burning front-end for Nautilus
nautilus-clamscan - Antivirus scanning for Nautilus
n........
Just install the following package "nautilus-image-converter" and you will be able to right click any image and convert the size and rotate it.
My only wish is that you could also convert the image type from say tiff to jpg etc...
This is an awesome/handy/feature and great tool to have. This is one way where GNOME/Nautilus excel, the possibilities are endless to simplify and make simple/mundane tasks quicker and more efficient than ever.........
ping test.com
connect: No buffer space available
/var/log/messages
Oct 18 12:21:03 vps kernel: printk: 177 messages suppressed.
Oct 18 12:21:03 vps kernel: Neighbour table overflow.
Solution in /etc/sysctl.conf:
net.ipv4.neigh.default.gc_thresh1 = 4096
net.ipv4.neigh.default.gc_thresh2 = 8192
net.ipv4.neigh.default.gc_thresh3 = 8192
net.ipv4.neigh.default.base_reachab........
Subnet Mask Lengths / Quick Reference
This is for when you say how many IPs would be in a /20 or /24
Now instead of doing math just remember this table or visit here more often :)
/32
1 IP Address(es)
/31
2 IP Address(es)........
Remember to replace "eth0" with your NIC device although usually it will be eth0.
Replace 192.168.1.1 with your default gateway, remember you can also add multiple gateways by adding a second/different default gateway.
route
Kernel IP routing table
Destination Gateway Genmask&nb........
This has stumped me a few times because I keep forgetting that Centos 5.5 comes with a default iptables configuration that ends up blocking DRBD traffic,I tried all the normal things and couldn't understand why I couldn't make my normal DRBD config work. So if you have WFConnection problems and have tried the normal "mailing list" fixes, check your firewall status first!
Both Nodes Say the Following:
version: 8.3.8 (api:88/prot........
Create New RAID 1 Array:
First setup your partitions (make sure they are exactly the same size)
In my example I have sda3 and sdb3 which are 500GB in size.
mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/sda3 /dev/sdb3
mdadm: array /dev/md2 started.
Check Status Of The Array
*Note I already have other arrays md0 and md1.
You can see below that md2 is syn........
I'm not impressed with OpenOffice writer, it can't beat Office XP still and speaking of that, after all these years, Wine still can't run Office XP Properly.
Back to the OpenOffice issue though, it likes to default paragraphs like this:
This is an OpenOffice Annoyance Example
See this indentation. It can be changed but Idon't see a way to default it back to the normal!
........
You'll see the following and the boot process will freeze:
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
I have struggled with this issue on vari........
I am a huge fan of Linux and the idea of OpenSource but I've said it many times, there are still hurdles in today in 2010 for Linux as a Desktop. Linux is still intended for servers at its very core. This can be changed succesfully though, as Apple has shown us with Mac OS X based on FreeBSD.
Half of the issue is lack of driver support and the other half is the Linux Kernel and Window Manages, KDE and GNome still both don't cut it (but they're getting closer).
I'll........
Different distributions such as Debian and Centos behave differently when trying to shutdown your system.
shutdown -H now on Debian does not do what you'd expect. The system won't power down, it will halt and do everything but power down.
shutdown -PH now will do the job though (actually power the system off). This is important to test especially if you are not near the system. If you just use -P it forcefully shuts off which is not........
Basically it seems that Thunderbird only remembers/savesfor the first/default identity account. It is very annoying when the signature gets placed at the bottom and another huge oversight on Mozilla's part.
Fortunately you can hack/manually set this setting.
The solution for fixing the Signature At the Bottom (Below The Quote)
Click Tools -> Options ->Advanced -> Config Editor
Then search for ".sig_bottom" and set them al........
This error is annoying, in a Virtuozzo KB entry about this ip tables nat problem they say the kernel needs to be ugpraded:
Symptoms
The node runs 2.6.18-x kernel older than 2.6.18-028stab053.10.
NAT module does not work in container, you get "can't initialize iptables table 'nat'" error:
# iptables -t nat........
This server was experiencing loads of up to 80 and maxing out the RAM and kmemsize on a CPanel VPS. There were literally dozens if not hundreds of exim processes. I have no idea why exim has such a design that would allow it to consume this much CPU and RAM. Any normal MTA should not be spawning so many processes, it should be processing them in sequence and if it is going to spawn hundreds of processes in response to a large volume of mail, it's better to have a delayed del........
Mencoder is great, you can throw anything at it, including video files from your camera and have it encode into xvid or almost any other format.
In my case I took 640x480 video from my Canon and reduced the size by 1/3 with the options below (there are many other options that you can read about in the manual but I like to keep it simple).
Mencoder Encode
mencoder -ovc xvid -oac mp3lame -xvidencopts fixed_quant=4 -o ........
I finally decided to look into some utils that did this, and the first one I found is "mp3burn". It is unbelievable simple and perfect. *2017-11 update and mp3burn is still available in standard repos such as Ubuntu 14/16 so this is a current and working project.
Just install the package and it gets all required libraries to convert and then burn's on the fly. And you won't believe how simple it is.
I just want to a directory that had the MP3's I wanted t........
This is obviously a bug in the r8169 kernel module and it seems to affect a lot of people. I upgraded to the latest kernel and hope this won't happen anymore, as it is a very serious error. This is especially serious for those who are running servers with this chipset, who can afford for the NIC to randomly go off-line for no apparent reason?
[655548.189113] type=1505 audit(1277067560.902:5): operation="profile_load" name="/usr/bin/freshclam&q........
Here is a RAID 1 partition (500GB Seagate & 2TB WD):
Sequential Reads
File Blk Num Avg Maximum Lat%&nbs........
This is a great way to use your ftp server space, for example on your web hosting account (althoughI believe many hosts don't allow storage like this), but if you have a VPS/Dedicated Server etc.., this would be perfect. Imagine how easy it is to work with an ftp account that you can just mount as a normal partition or directory in Linux, it would be great for backups etc..
Name
curlftpfs - mount a ftp host as a local directory
Synopsis........
My XBOX's dashboard/firmware was from sometime in 2008 when I first bought the system. I mainly played using composite cables but at my brother in law's house we used HDMI. The very first time it worked, but then I bought some games that did some update and after that HDMI never worked.
The symptoms besides having on sound is that your XBOX will show PC monitor resolutions but won't have any option to say you have a 720P or 1080P display, this means the XBOX firmware is fa........
I'm using Ubuntu 8.04 but anyone using older kernels will find this may apply to them. My Intel graphics are very slow with the default Xorg settings but by using "EXA" acceleration, scrolling down windows of text becomes pretty snappy.
Just edit /etc/X11/xorg.conf
Section "Device"
Identifier "Configured Video Device"
&nb........
I've recently used CPanel on the admin side for the first time and have to say I hate it. Everything from the layout to the functionality screams "hackish". It just lacks so many common sense features and way of working.
I was never 100% impressed with Plesk but the basics were definitely laid out and done in a sensible manner, even though it is made by a Russian company, they definitely thought about how to make a Control Panel.
I have no idea why people........
Why would you want to downgrade the superblock? Old mdadm verisons like mdadm 2.5.6 only use the 0.90 superblock/metadata and new versions use 1,1.0,1.1 and 1.2 superblocks by default.
There are some annoying caveats with this, first of all the new superblocks (later than 0.90) CANNOT be read by GRUB, so you won't even be able to install GRUB. Even worse, old versions of mdadm CANNOT automatically detect arrays even if they were created with a new version of mdadm with th........
Basically the two main types of distros are Debian and RHEL/Centos based. I'm just going to give a quick overview of how the configuration of IP interfaces works in Debian/Centos based distros.
*Just one thing to remember, when setting IPs statically you have to manually specify a DNS server in /etc/resolv.conf (since DHCP is what normally does it automatically)
Debian/Ubuntu/Kubuntu/MEPIS
The IP (DHCP &........
Which one does the OS care about? blkid says the UUID is "787f1fa4-b010-4d77-a010-795b42884f56" while md insists its UUID is "4d96dd3b:deb5d555:7adb93cb:ce9182d9"
When in doubt, do we assume the OS takes the one from blkid?
/dev/md0: UUID="787f1fa4-b010-4d77-a010-795b42884f56" TYPE="ext3"
[root@localhost ~]# mdadm -D /dev/md0
/dev/md0:
Version : 0.90
&........
I have an md0 arary that my Centos install refers to. I feel this is half the reason why it won't boot anymore.
I saw the initrd for Centos was assembling it as md127 even though it was known as md0.
The reason for this is because I used mdadm --assemble --scan to detect the array on a LiveCD. I had no idea this name would stick (but now I realize the name is permanently stored in the metadata once you mount md127 or whatever random name assemble gives it). W........
The default options for iptables are very basic. Here is what you need to do in order to enable them in OpenVZ.
1.) Add the modules to iptables and restart iptables:
vi /etc/sysconfig/iptables-config
Edit the line as so:
IPTABLES_MODULES="ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp"
2.........
I installed 5.5 with a 300GB RAID 1 partition (boot is also on this partition). It booted up fine the first few times until after I used a Live CD and accessed the array, and it became named /dev/md127 for some reason.
Now whenI boot into CentOS I get a kernel panic and different errors, once I got "invalid superblock", even though the array is fine (it didn't happen again, probably because I was sure to dismount and stop the mdadm array properly).
Here's what........
This function and others may not work with the stock PHPinstall on Centos/CPanel: Fatal error: Call to > undefined function imagecreatefromjpeg()
Even with libjpeg-devel installed it won't work because PHP was not compiled with jpeg support, so we have to do the dirty work ourselves :)
Here is the command/yum's I did to install missing libraries for PHP that configure will complain about (yes it is a one by one process).
yum install bzip2-........
This can be very annoying and CPanel doesn't seem to document it, or it's not found or made as obvious as it should be. It's always funny when I find it more difficult to work with a control panel than to do everytihng manually without CPanel or even Plesk.
So once again, the default serve path for contents is: /usr/local/apache/htdocs and this is especially applicable when accessing Apache by just an IP which is unbound to any domain at this point.........
I can never actually remember the order and the number of parameters so here they are:
minute
hour
day of month
month
day of week
command
0
5
*........
mdadm --assemble --scan
mdadm: /dev/md/diaghost05102010:2 has been started with 2 drives.
mdadm: /dev/md/diaghost05102010:1 has been started with 2 drives.
mdadm: /dev/md/diaghost05102010:0 has been started with 2 drives.
-bash-3.1# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4] [multipath]
md125 : active raid1 sda1[0] sdb1[1]
14658185 blocks super 1.2........
Out of memory: kill process 7559 (rsync) score 635 or a child
Killed process 7559 (rsync)
I was surprised to see this in my dmesg whenmy rsync backup suddenly stalled/stopped.
This system has 3 gigs of RAM and lots of free memory so I don't understand what is happening.
rsync invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
Pid: 7600, comm: rsync Not tainted 2.6.24.2 #83
[] oom_kill_pr........
Not sure what rsync switches/options to use?
rsync -PDrphogtl
The short version would be:
rsync -Pha
I think these are really common sense options to use and probaby should be the default.
Explanation of rsync switches
P = display the progress
D = hybrid of --specials and --devices so all special and device files will be copied as well.
r = recursive (otherwise rsync won't copy files deeper than........
This drive is clearly on the way out, the Kernel knows it but I'm surprised that SMART is not concerned. I didn't blame Seagate for their past issues until now. This hard drive has hardly been used and has not even been powered on for a year according to SMART.
Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.11
Device........
Seagate Inventory/Firmware Check
I heard about this issue a long time ago but never looked into it. I figured I wasn't affected since my 500GB drives were running for so long. I've been using Seagate's since 2002 and to this day all of the drives I have are alive from Seagate.
*Update the bad news is that I realize one of my 500GB's is about to die, it's not even a year old, but is also not affected by the recall according to Seagate!
Seagate Inventory/Firm........
You can find it for free at http://nginx.org/ I find nginx is simpler to setup than pound (it's not hard but I found it unintuitive and annoying), it seemed to make some basic setups overly complicated with the config file syntax.
nginx on the other hand is perfectly suited in everyway, it is even simpler to setup and seems to be the most stable and most efficient any load balancer. I would go as far as to say that a good nginx setup is more relia........
Before we start I take no responsibility for this, you should have a backup and if you make a mistake during this process you could wipe out all of your data. So backup somewhere else before starting this as a precaution, or make sure it's data you could afford to lose.
The RAID 1 Setup (Hardware Wise)
I've already setup my 2 x 1TB (Seagate) drives with identical partitions, make sure your new hard drive (the empty one) is setup like your curr........
I have no idea why but mkfs.ext3 defaults to a patheticlly small blocksize of 1024 bytes/1KB (kilobyte). That means the maximum filesize is ONLY 16GB! With 2KB/2048 bytes you get a 256 GB maximum filesize, and with 4KB/4096 bytes you get 2TB!
I finally noticed/paid attention to this after realizing that with rsync and scp that no file larger than 17GB could be transferred. I then realized it must be a file size limit on the partition.
Here is what tune2fs tol........
I'm really starting to love ImageMagick, I've used it to mass convert/resize family photos with scripts and all kinds of handy things.
Today I just learned that you can create PDF files with it too, say if you have images scanned or anything else it's very simple:
convert *.jpeg output.pdf
You can replace jpg with whatever format your files are in. One thing to remember is that you can specify the order that the images/pages are added to the PDF manu........
It's basically free bash shell script available from: http://wpkg.org/email2fax/index.php/Main_Page
Make sure you have the required tools:
libtiff
ghostscript
mpack/munpack
Where you can e-mail your Asterisk box and it will fax it to the phone number in the subject line. The good news ends there, it is fairly undocumented and buggy.
Take for example how the documentation mentions you can invoke from the com........
The folder I was trying to archive is about 72GB, but much like rsync at about 17GB it chokes because of the filesize. What's with so many common and essential Linux tools having such limitations? I guess it is likely that the authors never wrote their code with the idea that files would be so large but it's still very annoying. It's important to stay on top of these limitations on production servers because I didn't realize what happened until I checked the file with "........
I decided on using yum to help me decide even though I normaly use proftpd I decided to see what else I could find.
yum search ftp
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* rpmforge: ftp-stud.fht-esslingen.de
* base: mirrors.netdna.com
* updates: updates.interworx.info
* addons: yum.singlehop.com
* extras: mirrors.netdna.com
rpmforge........
PHP cannot access /usr/bin/opensslI have verified the username that runs the process is able to access /usr/bin/openssl and it does exist but the PHP script is saying it doesn't exist:
[code:1:1fd0f3abbe]
if (!file_exists($OPENSSL)) {
//echo "ERROR: OPENSSL $OPENSSL not foundn";
}[/code:1:1fd0f3abbe]
I don't get itI can clearly see the contents of /usr/bin by using the PHP system fu........
JavaScript get valued of selected drop down l
[code:1:4be190f44a]Package = OrderForm.package.options[OrderForm.package.selectedIndex].value;[/code:1:4be190f44a]
OrderForm = Name of HTML form the SELECT is inside
package = Name of SELECT element eg.
JavaScript says form name is not defined even though it is
I've integrated this into my design and I got an error saying the Form Name i........
JavaScript how to do math arithmetic with floats and intI have 3 variables some of which are just int and some float and need to find their sum
It just adds them as strings for some reason.Normally this would work but the floats were actually text technically I guess since they came from a form.
You need to convert them using parseFloat() and then everything is fine.........
JavasScript how to set or write value in id tagbla
I need to set a value inside that DIV tag using Javascript, how would I do it?Doesn't work for me:
[quote:c6b5f693a5]Warning: Element referenced by ID/NAME in the global scope. Use W3C standard document.getElementById() instead.
Source File: http://hosting.com/vps-order.html
Line: 19[/quote:c6b5f693a5]
[code:1:c6b5f693a5]........
Change default shellJust echo this at your command line (in this case I chose bash since I prefer the bash shell) this way it will be the default when you login again
[code:1:71e2834907]chsh -s bash[/code:1:71e2834907]........
Asterisk FreeBSD compile problemsI couldn't get it to compile without using the following options at compile time:
[b:b7d672ee28]
make install WITHOUT_ZAPTEL=YES WITHOUT_MYSQL=YES WITHOUT_FAX=YES WITHOUT_ODBC=YES WITHOUT_H323=YES[/b:b7d672ee28]Some problems you might have with copying over your Linux config files to FreeBSD is different paths.
[b:f044931f41]For example the etc path for Asterisk on BSD will now be:[/b:f044931f41]
[qu........
Problems surfing web/servingI noticed sometimes websites wouldn't load at random through a FreeBSD box and other systems on the same link didn't have the issue. I believe it is because of the low default limit of 128 TCP connections that caused the problem. It would also slow down any traffic that requires many connections such as Bittorrent.
The fix is to increase the amount of connections to at least 1024
Edit [b:520b050d3e]/etc/sysctl.conf[/b:520b05........
Nice General Linux RAID 1 GuideFull examples/tutorials that should work for any Linux system using GRUB or LILO as the boot loader.
This is the only tutorial I've seen that clearly shows how you can convert an existing non-RAID system to software RAID1 remotely, without ever having to be at the computer. This is important for people who co-locate or rent dedicated servers that they may not have physical access to in a timely manner.
https://alioth.debia........
Nice tutorial on working with browser windowsCheck:
*if a window is open/exists
* how to close a window
and more..
http://www.webreference.com/js/tutorial1/exist.html........
Heredoc warningsExample
$somevariable = ........
locate: command not found (slocate database needed)For some versions especially older ones like 3.x they might not have the "slocate" database.
Meaning a "locate somefile" command doesn't work.
Just install "slocate"
[code:1:d6d717421c]yum install slocate[/code:1:d6d717421c]
Then run:
[code:1:d6d717421c]updatedb[/code:1:d6d717421c]
And you're good to go :)........
Telus + 2Wire 2700 Router HorribleWell first of all let me say this is the only router/switch that sometimes seems to crash/disconnect computers on the local network.
This device also thought it would be smart to block VOIP packets coming from my Sipura ATA VOIP adapters so I disabled the [quote:cb89ba7bff]"Invalid TCP Flag Attacks (NULL/XMAS/Other)"[/quote:cb89ba7bff] option
Then all of a sudden I couldn't get onto any web pages, the wireless........
Need identd for port 113 ? Install authdyum install authd
Happy identing :)Actually it's not that simple.
It installs as an "xinetd" service and is disabled and turned off by deafult.
To enable it run:
[code:1:8c94df8319]
chkconfig --level 3 auth on
service xinetd restart
[/code:1:8c94df8319]
This will set identd aka authd to start by default.
service xinetd resta........
Quick Tutorial On Starting A Web Site[b:3cef3c01b6]Step 1.[/b:3cef3c01b6] Purchase a Domain Name (eg. yoursite.com)
[b:3cef3c01b6]Step 2.[/b:3cef3c01b6] Design your site using a program such as Microsoft Frontpage or Macromedia Dreamweaver. If you are unable or unfamiliar with doing this you may want to hire a company to create your site (many of them will handle each aspect of setting up your site).
[b:3cef3c01b6]Step 3.[/b:3cef3c01b6] Host your site........
Intel's Finnish FetishIntel's Finnish Fetish
By Dave Mock
June 13, 2005
Chipmaker Intel (NASDAQ: INTC) has successfully topped the personal computer market for decades. Breaking into related areas such as communications has been much difficult for the world's largest semiconductor maker. But a new partnership with Nokia (NYSE: NOK) could help to change that.
Intel's forays into cellular-phone and home-entertaiment-device chips have........
Asterisk Queue Context ExplainedThis was never explained in voip-info or any other site I read.
It is understood you can escape to a context from a queue and how to specify it.
[b:882f1e0aee]
What is NOT mentioned is that the context= you specify within the queues.conf refers to a [i:882f1e0aee]context that exists in extensions.conf[/i:882f1e0aee][/b:882f1e0aee]
This will save you headaches if you need to escape from the queue :)........
PHP imagecreate() not found but compiled with GDHere is what I get:
[code:1:be41bc7717]
Fatal error: Call to undefined function: imagejpeg() in image.php on line 56
[/code:1:be41bc7717]
I am positive it is compiled with GD so I don't get the errorI need to install the linux-jpeg package
then
I need to recompil........
REMOVE a field[quote:effdb203d8]ALTER TABLE table_name DROP field_name[/quote:effdb203d8]........
CVSUp the Easy WayIf you're reading this you probably have never used CVSUp or don't know how.
CVSUp can be used for two things or just one if you prefer.
*Keeping your kernel up to date
*Keeping your port list up to date
Start by editing the following file in:
[b:76928b387d]vi /usr/share/examples/cvsup/cvs-upfile[/b:76928b387d]
It can be quite overwhelming with all the crazy options.
Basically there are only 3........
CDR Manufacturers - Why is so much media bad?I have searched for good media and tried many kinds for years. I guess I'll try to summarize my findings and conclusions.
Dye is irrelevant, dye of any color can be good or bad, it more likely depends on the manufacturer.
Speaking of manufacturers, the name at the top of the disc means nothing. For example, Memorex along with any other 'brand' is actually always made by another manufaturer including CMC Mag........
Use Mozilla Firefox, not Internet Explorer - You'll be glad!Hey guys,
I just thought I'd recommend that everyone switch to Mozilla Firefox as their web browser. You can find it at http://mozilla.org
It is free and it is much better than IE. It has a built-in popup blocker which works great and most importantly, it doesn't have a million critical security flaws which could compromise your security such as passwords for on-line banking etc..........
Basic Port ListingHopefully someone finds this useful or at least interesting.
http://www.sans.org/top20/#u9
Name Port Protocol Description
Small services ........
Other Security Web SitesSeveral websites actively track security issues. This list provides you with the major providers
of security information on the Web. Many of these organizations also provide newsletters and
mailings to announce changes or security threats:
Center for Education and Research in Information Assurance and Security (CERIAS)
CERIAS is an industry-sponsored center at Purdue University that is focused on technology and
relate........
Clustering LinksI thought this might be interesting for people with spare time.
[b:6423c19973]Great clustering article from Linux Mag[/b:6423c19973]
http://www.linux-mag.com/2003-11/clusters_01.html
[b:6423c19973]General Linux cluster information[/b:6423c19973]
http://www.gdargaud.net/Hack/ClusterNotes.html#HighA
http://www.faqs.org/docs/Linux-HOWTO/Cluster-HOWTO.html#s3
http://www.yolinux.com/TUTORIALS/LinuxClustersAndFileSys........
Load Balancing/ClusteringAn interesting article that discusses the pros, cons and viability of load balancing/clustering
http://www.wwwcoder.com/main/parentid/493/site/4189/68/default.aspx
ZoneEdit seems to offer an interesting Fail Over Service as well:
http://www.zoneedit.com/doc/faq.html#fo........
Broadband PreferencesLet's see what people prefer.........
InnoSetup is something Ijust realized many commercial developers use for installation. Why? Because it's100% FREE, simple, and efficient to use.
The maker has really done a great job and the installer basically works on all versions of Windows since 95.
I'll keep this in mind the next time I code a Windows application since it's been years for me.........
I played around with xmit power (how much power in mW) to see if I could increase the range and signal strength. Idon't think this Linksys WRT54G's strength is the wireless, it seems to have poor signal quality and transfer rates all around.
Ithink part of the problem is also that there are several wireless networks around my house that could be interfering and the walls are thick here.
Anyaway, moving on now :) The default is 28mW and I increased it to........
*This is a bug with initramfs support, all kernels after around 2.6.27.54 suffer from this problem.
If you try to include initramfs into your kernel (I mean actually building your binaries into the kernel) this will always happen. Obviously some code has changed in recent kernels that is present in all new kernels, it makes it impossible to boot
I've tried the latest 2.6.32, 2.6.33, 2.6.34, 2.6.35, 2.6.36, 2.6.37, 2.6.38 kernels and they all do this. I found one bug re........
There is actually by default a "Default SSL" vhost that can mess things up for you and can cause surprising and unexpected results.
Default Apache SSL Cert
in /etc/httpd/conf.d/ssl.conf there is a default SSL Virtual Host which screws things up by offering itself instead of the SSL cert I specify in my own vhosts........
Shortcut/Easiest Way To Create A Self-Signed Key:
openssl req -new -x509 -nodes -days 1530 -out server.crt -keyout server.key
Using the above, you instantly create a self-signed certificate valid for 1530 days and you can simply skip to step #5.) below.
If You Need a Real SSLCertificate (eg. Equifax/Openssl) then you need to create a CSR request (you'll need to follow Steps 1.) and 2.) in order to create the CSR. You then upload the CSR Certi........
top - 09:34:12 up 2 days, 20:57, 2 users, load average: 1.83, 1.99, 2.03
Tasks: 59 total, 2 running, 57 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.3%us, 0.0%sy, 0.0%ni, 0.0%id, 99.7%wa, 0.0%hi, 0.0%si, 0.0%st
That 99.7% wa is iowait, it means the server is waiting for a process to complete an IOoperation or in plain English, there is a delay in........
Everyone says there is a "manual" way of doing it and then they tell you to use iTunes, but if you're like me, you're travelling on business in a foreign country and your laptop does not have iTunes and you don't have a way of getting it and/or don't want it.
For this example I'm using the provider "du" in Dubai, UAE (United Arab Emirates) but this method works for virtually all providers.
The requirements in this case to truly "manually update........
This is something that happens a lot and it is very dirty, as you probably know each site is hosted on a certain IP address. Sometimes a domain is hosted by a single IP address and the IP address defaults to this very same domain.
This means that if someone buys domain abcd.com and enters your IP address (the one of your website) as the A record, your content will show up on their domain as if it was their own.
There is an easy way to prevent this by using .htacces........
I've tried to find a good sensible solution to cluster with and each technology has it's pros and cons and there is no perfect solution and I've found a lot of "exaggerations" in the applications, benefits and performance of these different filesystems.
DRBD
I first started off with DRBD and Ihave to say it does live up to the hype, is quite reliable (although it can be annoying to match up the kernel module and user applications since they must match and whe........
Iwas getting really annoyed with this, I used full quotes around the filename and vi, cat, less all thought I was trying to pass the dash in the filename as an argument.
I didn't realize that all you have to do is just put a dash dash "--"in front.
Here's an example:cat -- "-etc-glusterfs-glusterfsd.vol.log"
Without the -- you get: cat: invalid option -- c
Try `cat --help' for more information.
Ih........
Backing MySQL Databases
Backing Up/Dumping All Mysql Databases To A Single File
mysqldump --all-databases -u admin -p > allmysqldatabases.sql
The "-all-databases" clause is pretty obvious isn't it? It means that it will backup all databases.
The "-u admin" means login using the user "admin", if you h........
I was getting very frustrated one day wondering why it appeared my .htaccess file was being ignored and not processed by Apache. No matter what I did it was obvious that Apache didn't care about my .htaccess file. Then I realized that the default settings must be in effect, which is that my vhost didn't explicitly allow me to override the default settings.
This usually comes down to your vhost settings. Make sure you have an entry like this in your Apache vhost settings in........
Apple crippled the iPhone by not allowing multi-tasking of the non-primary apps. I use SSH a lot and I don't want to close my session just to check my e-mail, etc, now an app found in Cydia called "Backgrounder" allows just that.
Although it's not perfect, we installed the correct one for "3.x" iPhones and hit "Reload SpringBoard" and the hour/circle glass has just been going for minutes.
It seems like it installed fine even with the crash t........
Truly, the only way to unleash the capabilities and customization abilities of iPhone are to jailbreak, it's not just for hackers anymore.
A few days ago someone by the named of "geohot" released a single click application called "purplera1n", which does the entire operation smoothly and seamlessly.
In our case, the first time it went as far as "done, wait for reboot" on our Windows machine and for minutes we waited and saw the pic on the iPhone w........
Yes, Iadmit I finally got bitten by the hype as much as I can usually see through it all. Keep in mind this review is of the "stock" phone, no jailbreaking yet which is what really unleashes the customizability and whyI bought iPhone.
I had better things to say about this phone before buying it, and it is a great phone, perhaps the best on the market by far, if not because of the Mac OS port onto the iPhone and all the apps, etc, etc.
With that said........
I've had an old Blackberry for a few years and I was ready to spend some serious cash on a nice Nokia. I love the idea of the Linux based Symbian S60 OS, so I was looking at phones like the E63, E71 (both are basically the same, at least CPU/screensize although E71 is thinner, has a 3MP camera, has GPS, and has dedicated buttons to adjust the volume).
Then Iheard about the N97 and what a revolution it was supposed to be and it was even compared to iPhone.
To........
This is the Intel Atom 330 motherboard with integrated Realtek Gigabit NIC (Intel Desktop Board D945GCLF2 Motherboard W/ Atom 330 1.6 GHz Dual Core Processor - Mini-ITX)
I cannot achieve more than 15 MB/s, even doing a local transfer through eth0 to it's own IP.
100% 95MB 15.9MB/s 00:06
So this is not a cabling, switch or hardware issue, it seems like a driver or chipset limitation problem.
Here is my........
This is really something the SSHServer developers should consider. The cause of this annoyance is because of failed DNS lookups on your IPaddress, which is especially common for many dedicated/col-located servers and also computers on internal NAT/private networks.
The chances are this is the cause of your SSHSlow/Delayed Login problems.
The easy solution to SSH Login Problems
Edit /etc/ssh/sshd_config
Add this line to disable r........
Igot this after copying a VMWare image onto another machine in Debian.
SIOCSIFADDR No such device eth0 error while getting interface flags
The solution
1.) Find and edit the device line in persisent-net.rules note it will be prefixed with something like z25 or something else.
vi /etc/udev/rules.d/z25_persistent-net.rules
The easiest way is to comment anything out.
If you are feeling........
When trying to even cd or ls the mounted OCFS2 partition it crashes. Ithink this is a combination of VMWare Server's problem and the way I mounted and symlinked to it.
More than anything this shows the problem and lack of forsight with VMWare, but also that OCFS2 is easily crashed if you do strange things.
Output of /var/log/messages for OCFS2
Apr 10 15:57:45 localhost kernel: [84331.691258] Modules linked in: vmnet vmci vmmon ocfs2_stac........
There's a lot of information and guides on OCFS2 for RHELand Centos Linux but the package setup and configuration is slightly different and this has thrown some people off.
Installing OC2FS
You should install the following packages to get started:
apt-get install ocfs2-tools ocfs2console
Configure OC2FS
In RHEL/Centos the main configuration file is located in /etc/sysconfig/o2cb
However in Debian based Linux it is located........
This will give you the basic info needed to browse and connect to Samba shares from the command line. From the GUI of Gnome or KDE etc, it is pretty standard and straight forward. However, I've found very little guides on how to do it from the command line and if you're like me, a nerd who prefers command line for its simplicity and for remote use, this is the way to go.
First get a list of all the Samba/SMB shares on the target.
smbclient -L hostname........
User username from 127.0.0.1 not allowed because not listed in AllowUsers
What's going on? The user was created properly, it has been defined as having a shell entry and the entry for /etc/passwd and /etc/shadow is set just fine.
This is a new and very smart/secure feature of SSHD. It is simple and yet effective, but also very annoying if you didn't know about it being implemented and that hand editing of /etc/ssh/sshd_config is required to allow a newly add........
This happened on one of my Ubuntu machines where Igot some kind of segfault on line 21 from LAME at random while encoding MP3s (a second try is fine usually). I've read that it's best to compile it from source and that has solved most issues for people.
Here is my preferred configure line:
./configure --enable-mp3x --with-fileio=lame --enable-debug --with-vorbis
Even with that I got a different error this tim........
Feb 5 01:39:33 server named[19768]: zone myzone.com/IN: serial number (12331465) received from master 127.0.0.2#53 < ours (200901281)
The above is taken from /var/log/messages
This can be annoying, it can happen for a variety of reasons. What seems to be happening here is that the slave realizes the time on the slave is ahead of the master, so it therefore assumes it has the most up to date copy and won't actually transfer the zone.
The solutio........
There's a lot of outdated information and confusion for system administrator's out there.
One annoying task for many an Administrator has been backing up data in Linux. You don't need any GUI tools such as K3B or GnomeBaker. Both are excellent tools but for veteran command line users working remotely, using the keyboard is a great and possibly automated way to save yourself pain and hassle.
At a later date we'll cover how scripting can automatically backup certain........