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........
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........
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.........
When Is It Time to Leave Your VPS, VDS, and Dedicated Server Provider?
Choosing the right hosting solution—be it Virtu........
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........
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........
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --output=aclocal.m4t
Can't exec "aclocal": No such file or directory at /usr/share/autoconf/Autom4te/FileUtils.pm line 326.
autoreconf: failed to run aclocal: No such file or directory
make: *** [/software/pixman/configure] Error 1
Just install automake:
yum install automake........
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........
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........
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........
Just hit **# on the keypad and the CIPCwill enable the button in settings for a factory reset. Sometimes the phone may run into issues or may be unable to register to another tftp server (eg. another CME or CUCM server) due to a bug or maybe due to the security settings tying it to a specific server.
Step 1 - Click Settings
Step 2 - Hit "**#"........
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:........
See below in the screenshot that copy is disabled by visual mode which enables automatically:
Fix it by setting this .vimrc option:
echo "set mouse-=a" >> ~/.vimrc........
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,........
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........
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........
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........
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.........
Router#show license
Index 1 Feature: ipbasek9
Period left: Life time
License Type: Permanent
License State: Active, In Use
License Count: Non-Counted
Lic........
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........
It is a bit different and annoying here for these types of routers/models as you need to physically remove the CF (Compact Flash) and only then, will it enter ROMMON mode (Ctrl + Pause remotely over the console will not do it for us). This means you cannot do this remotely, or at least not without the help of a remote/physical helper.
Step 1.) Power off, router and remove CF Disk Slot#2
Go to the router and remove the slot#2 cover uses your hand or it may help to use a........
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........
I've encountered this after upgrading some Debian/Ubuntu/Mint based systems for no explicable reason, although there are some bug trackers on Ubuntu that document this: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1889509
The short end of the solution is that you need to properly reinstall grub.
1.) Boot from a LiveCD
2.) Mount your root / filesystem and don't forget to mo........
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.
........
Sometimes manual intervention on various Linux system's, including Debian, is required to fix things after waking up from sleep.
One persistent issue is the sound system / pulseaudio needing to be reset and not working until you do that after waking up. It's not clear if it's an OS issue itself or the sound driver, but this will fix things.
Where do we put scripts or commands that need to be used upon wakeup automatically?
/lib/systemd/syst........
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........
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........
Let's say you have a VM file that uses 200G of dynamic space, but really only has 40G in usage. If you add fles and delete, at some point the file will be larger than the current space you are using.
Take this image which shows is using 71G of space on the host:
The actual space being used inside the image is about 43G as we can see:........
(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.........
Just click on the Start Menu and go to "Startup Applications"
Then click on the "Add"Button
Now enter the command we need to open the folder/directory automatically using the filemanager
For remote SSH host (you need pub key auth for it to open without a pa........
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........
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.........
A lot of newer installs will automatically prohibit the root user from logging in directly, for security reasons or they will only allow key based access.
If you know what you are doing/don't care about security or have an incredibly secure password for testing, then you can enable it.
Edit this file: /etc/ssh/sshd_config
Find the following line: PermitRootLogin
Set it like this:
PermitRootLogin yes
Now rest........
From the terminal do this:
cat /proc/cpuinfo|grep -E "svm|vmx"
You should get output like this(svm = AMD-v and vmx=Intel-VTx):
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqd........
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........
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........
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........
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........
Teams for Linux is horribly broken, especially because the calendar doesn't show any meetings so unless you are in the right Team and Channel at the right time, you cannot join your meeting or know there is one.
As you can see there is an orange bar to represent the meeting but you cannot click it or it makes a new meeting. For some reason this bug is only present in the Linux app but not in the Android App or from the web calendar.
This is a horrible design flaw that ca........
It took a lot of fiddling to make a Huion Kamvas 13 Pro work in Linux but it simple once you know what to do. Don't bother searching as it is unlkely there is a guide out there that will actually make your tablet work.
It mainly comes down to the fact that the hid_uclogic kernel module is buggy or doesn't support MANYof these wacom based/Huion tablets properly.
What was happening with me is that Ihad the Kamvas 13 Huion setup as a secondary screen/monitor.&nb........
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 idlepc value is very important to dynamips and it is both image and often CPU dependent. There is no "magic"value that will work for all images and all CPUs so this is why I'll show you a quick and handy way.
Also don't be disappointed, some values do not work well but idlepc gives you several. For example in my example below #6 didn't help at all but #7 got me down to about 6% CPU from 99-100%.
*Befo........
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........
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)........
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........
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........
radeon_dp_aux_transfer_native: 158 callbacks suppressed
The simple answer is that radeon driver sucks and is a remnant of typical AMD/ATI issues.
Use AMDGPUif you support it:........
yum -y install wget unzip
wget https://download.nextcloud.com/server/releases/nextcloud-18.0.2.zip
unzip nextcloud-18.0.2.zip
yum -y install php php-mysqlnd php-json php-zip php-dom php-xml php-libxml php-mbstring php-gd mysql mysql-server
Last metadata expiration check: 0:58:02 ago on Fri 13 Mar 2020 02:12:49 PM EDT.
Dependencies resolved.
===================================================================........
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........
The scenario here is that you have some sort of remote headless Linux server but would like to run some programs on them and get graphical access to them. The problem is that the remote server may be an image or VMwithout any virtual GPU and even if so, it is likely without KDE or Gnome, so there's no real way to do this, unless you follow our guide.
Install xvfb
apt install xvfb
Reading package lists... D........
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;........
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........
The easiest way to know if your videos are playing with GPU acceleration are to watch the process of xplayer, mpv or whatever you are playing. The CPU usage should be no more than 10% for that process/program if it is using acceleration.
Let's manually play with vdpau to make sure it works before we make it permanent:
First make sure you have libvdpau installed:
sudo apt install vdpau-driver-all
If yo........
mysql reset root password.
Oops I can't remember my MySQL root password!
[root@centos7test etc]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
First we need to stop mariadb:
systemctl stop mariadb
Now we need to restart it with skip-grant-tables whic........
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........
Most of us know the heredoc method but what if you need a basic query done repeatedly and manually while working from bash? It is a pain to manually type mysql and login each time.
With this command below you can semi-automate those queries:
echo "use somedb; select * from auctions" | mysql -u root --password="yourpassword"
Just modify the above to suit your needs and you can add more queries by adding a sem........
Create Database:
create database yourdbname;
Show All Databases:
show databases;
Change Database:
use mysql;
Drop / Delete a MySQL Database:
drop database nameofyourdatabase;........
In Centos 7 tftpd will not work with selinux. Clients will not be able to connect and this is all you'll see in the log (then nothing more):
Sep 18 14:39:15 localhost xinetd[4327]: START: tftp pid=4331 from=192.168.1.65
On the client/computer side you will see this:
TFTP.
PXE-M0F: Exiting Intel Boot Agent
Basically the client is being instantly connected and bloc........
I don't consider a lot of these "extra" kernel modules "nice to have" as they often contain drivers for essential items like your soundcard, your NIC and many other devices that may not work. Sometimes you may find that "sound" or "ethernet" worked before a kernel/OS upgrade and now in the new version they don't. Often it will be because you need to install the "extra" kernel modules.
One other weird thing is that sometimes........
python3 testserver.com-car-scraping.py html.txt
Traceback (most recent call last):
File "testserver.com-car-scraping.py", line 5, in
import mysql.connector
ImportError: No module named 'mysql'
For some reason it won't install properly even though I have the mysql client on this machine installed too.
Solution:
You need the mys........
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";........
SSH helps keep us secure in many ways, one of those is the host-key fingerprint which is unique. If you have been connecting to an SSH server that you've made no changes to and suddenly ssh warns that the key doesn't match then you have a problem.
But how about connecting to an existing server for the first time on a new machine or client?
A lot of new clients calculate it using an SHA256 hash but it is not as easy on your host machine to produce the sam........
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........
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
........
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.........
This will find all tap devices and try deleting all of them. Of course don't run this if there is a chance an unused tap device is necessary and would not be created by the script ro application using it.
for tap in `ifconfig -a|grep tap[0-255]|awk '{print $1}'`; do
tunctl -d $tap
done........
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........
WARNING: Image format was not specified for '/mnt/space/cucm12.img' and probing guessed raw.
Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
Specify the 'raw' format explicitly to remove the restrictions.
#you should manually specify the format
q........
#!/bin/bash
sshcommand="ssh -N -R 20000:localhost:22 user@8.8.8.8"
result=`ps aux|grep $sshcommand"|grep -v grep`
if [ -z "$result" ]; then
echo "we are going to connect"
$sshcommand
else
echo "we are already connected"
fi
This is a handy script you can use and then add it to cron.
Save........
If you have an SSHproxy that you need to run automatically from cron you will need it in the background to work.
ssh -N -D 22000 user@domain.com
Basically the -N let's it continue running in the background.........
So say you are behind a typical NAT/LAN setup whether at home, work or while travelling. What if you have a computer or server that you need to connect to from the outside?
Yes you could use a VPN but a quick and dirty, temporary and secure way is to use SSH's Reverse Tunneling Proxy feature.
Requirements
On the remote ssh server host you need the GatewayPorts option enabled in sshd_config (be........
What you need to do if you have taken a dd or real raw image dump of a hard disk:
VBoxManage convertdd windows2019-eval-template.img windows2019.vdi --format VDI
The .img is the raw dd dump and the .vdi is the output file.
--format VDIspecifies to output to .vdi format
If you are in a pinch you can always use qemu-kvm binary and manually specify the .img as your disk and i........
Idid a systemctl restart networking and it broke Proxmox VM connectivity!
#proxmox is the problem after restarting the network the tap devices go to disabled state
[2230884.919905] vmbr0: port 7(tap118i0) entered disabled state
[2230884.948864] vmbr0: port 8(tap122i0) entered disabled state
[2230884.972748] vmbr0: port 6(tap119i0) entered disabled state
[2230885.004745] vmbr0: port 5(tap117i0) entered disabled state
[2230885.03673........
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 ........
debug1: Local connections to LOCALHOST:18006 forwarded to remote address 192.168.1.93:8006
debug1: Local forwarding listening on 127.0.0.1 port 18006.
debug1: channel 0: new [port listener]
debug1: Local forwarding listening on ::1 port 18006.
bind: Cannot assign requested address
What we are seeing is that we can't listen on an IPV6 address of ::1. We need to tell SSH to stop using IPV6 so we'll edit ssh_config to take care of this issue........
Jan 30 17:16:10 localhost sshd[25385]: error: Failed to allocate internet-domain X11 display socket.
The solution for me on the server side was the following in sshd_config:
AddressFamily inet
*Remember to restart sshd and also reconnect from the client side.
Ihad all the normal X11 settings on the server but it just stopped........
Navigate to Tools -> Account Settings -> Server Settings
Uncheck the following:
"Check for new messages on startup"
"Check for new messages every NN minutes"
"Automatically download new messages".
Source: http://forums.mozillazine.org/viewtopic.php?t=635510........
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........
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........
growisofs -Z /dev/sr0 critical.tar.gz.gpg
Executing 'genisoimage critical.tar.gz.gpg | builtin_dd of=/dev/sr0 obs=32k seek=0'
I: -input-charset not specified, using utf-8 (detected in locale settings)
File critical.tar.gz.gpg is larger than 4GiB-1.
-allow-limited-size was not specified. There is no way do represent this file size. Aborting.
:-( write failed: Input/output error
#remember to us........
In a RAID array I had a have periodically lost a drive here and there over the past several months. Iwas always able to readd and resync without losing data. However at some point it looks like some minor corruption happened and this makes DRBD unhappy.
Using fsck did not help either.
Dec 19 06:01:45 storageboxtest4 kernel: [19005.945890] EXT3-fs error (device drbd0): ext3_get_inode_loc: unable to read inode block - inode=22184379........
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........
Before getting into the output here is my typical experience with SMART, there is what I call a "bad disk" with pending and uncorrectable sectors that cannot be reallocated.
It has caused a kernel panic and system crash repeatedly as we can see from the logs.
But SMART says it has "PASSED" its self assessment. SMART is still useful to me but it is more about looking at Current_Pending_Sector.
Any time I have had anything but 0 for that attribute it........
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.........
mytop is one of my favorite tools and it is fairly simple aside from a few caveats and issues that persist to this day.
To install it on Centos:
yum -y install centos
Configure ~/.mytop
vi ~/.mytop
user=root
host=localhost
db=test
#port=3306
socket=/var/lib/mysql/mysql.sock
header=1
color=1
Try runni........
When converting binary the easiest way is to write out a vertical list in a format like below and follow the formula in the table.
Example Convert 1101 1111 to decimal.
Step 1.)
Write out the binary below in vertical form (leave lots of space on the left side).
Keep this in mind that the "previous sum" starts at 0 on your first line.
Step 2.)
Formula:
2 *........
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........
You'll have to violate the iso9660 standards but it is necessary if you want to preserve your filesystem and filenames and shouldn't be an issue as long as you are using a modern OS like Linux.
genisoimage -o Backup-Myfiles.iso -r -J -joliet-long /some/path/
You will get errors like below (even enabling joliet-long didn't help)
genisoimage: Error: /some/filename.pdf have the same Joliet name
Joliet tree sort failed. The -joliet-lo........
[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&........
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x00005556ba09c070] _serverNamespace = / action = Allow _pipeName =/var/run/vmware/vpxd-webserver-pipe)
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x00007fd26000b240] _serverNamespace = /ui action = Allow _port = 5090)
Errors like the above are usually because there is an issue with your vSphere or more commonly it i........
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........
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........
[root@localhost:~]
BootModuleConfig.sh echo host-ind nfcd........
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........
This is often the result of PayPal's "item name" or another name having invalid characters or not supporting Unicode.
173.0.81.1 - - [17/Jul/2018:13:39:45 -0400] "POST //modules/gateways/callback/paypal.php HTTP/1.1" 406 - "-" "PayPal IPN ( https://www.paypal.com/ipn )"
A good clue is if you check the debug output of the IPNand find a mandatory column empty.
........
Ialready have the caja-image-converter option installed but it shows nothing.
Weirdly enough if you install nemo and nautilus converter it does show and work inside caja:
The solution is to install *-image-converter
sudo apt-get install *-image-converter
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'n........
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........
I had this error in an unsupported CPUon VMWare 6.7 and apparently this sometimes works especially on older VMWare versions like 6.5 5.5 etc (but in my case it did not).
To make sure it proceed when you see "Loading VMWare"
Hit "Shift+O"
Then add "ignoreHeadless=TRUE"
See an example below:........
#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........
This is most likely to happen on a normal GUI system like Ubuntu or Linux Mint. If you or the user is meant to have sudo / root privileges it is as simple as editing the following files:
Now assume your username is "iamtheuser"
vi /etc/group
adm:x:4:syslog,iamtheuser
sudo:x:27:anotheruser,iamtheuser
Find the above lines and add a comma and "ia........
Database Error
One or more of the WHMCS database tables appear to be either missing or corrupted. Please check and repair.
This error can be misleading especially if you know you are using a known good backup or restoration of the WHMCS database. The error can also be that the user lacks permissions to read and write to the database.
To check to this in MySQL shell:
GRANT read,write to dbusername@localhost on dbna........
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Apache/2.2.15 (CentOS) Server at testdomain.com Port 80........
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........
It is well known hackers, the NSA, CIA and other groups have created malware to secretly turn on your webcam and microphone on your phone, tv etc.. But fortunately on our computers and laptops we have some options.
Most webcams use the "uvcvideo" kernel module / driver. You can disable this in two ways on boot. I recommend both just as a failsafe.
Disable it on rc.local once your system boots automatically
Add the followi........
It is simple the user just needs to be given the "LOCK TABLES" privilege.
As root run this command:
GRANT LOCK TABLES ON yourdatabase.* TO yourmysqluser@localhost;........
GRANT SELECT, LOCK TABLES ON *.* TO yourmysqluser@localhost;
All you need to do a full MySQL dump on all databases is the SELECT and LOCK TABLES privileges. This way you don't have to use the mysql root user. Data could be compromised this way but at least no harm from manipulation, changes or deletion are possible by locking down the privileges to the minimum for a full MySQL dump and backup.........
Starting container...
vzquota : (error) Quota on syscall for id 4532: No such file or directory
vzquota on failed [3]
Solution
vzquota drop 4532
Then start the container and it should work. It actually happened after migrating the VPS manually to ano........
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........
I've never seen this before in all of my years. Ihave some very old CDs and DVDs 12-15 years old that seem not to work in this BD-R/DVD-R/CD-R Asus drive.
The discs are fine actually and ironically they even work fine on a normal LG USB based BD-R drive!
Here are the errors in Linux:
[2914936.884924] attempt to access beyond end of device
[2914936.884927] loop1: rw=0, want=730424, limit=688384
[2914954.556873] attempt to........
Install requirements:
yum -y install gmp-devel mpfr-devel libmpc-devel glibc-devel glibc-devel.i686 zip unzip jar
Download, untar, configure, compile and install GCC
http://mirrors.kernel.org/gnu/gcc/gcc-5.5.0/gcc-5.5.0.tar.gz
tar -zxvf gcc-5.5.0.tar.gz
cd gcc-5.5.0
./configure
make
make install
Now you need to cleanup th........
A great way if you have a bunch of drives and mdadm connected and are looking for backups/archives and don't know what is where!
for md in `cat /proc/mdstat|grep md[0-99]|awk '{print $1}'`; do mkdir /mnt/$md; mount /dev/$md /mnt/$md; done........
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........
I have never had this error on Linux and this is running FreeBSD as root:
Wed Aug 9 04:29:34 2017 us=329050 Cannot allocate TUN/TAP dev dynamically
Wed Aug 9 04:29:34 2017 us=329832 Exiting due to fatal error
The Solution you need a kernel module that is for some reason not automatically loaded like Linux:
kldload if_tap........
Centos 5 is not supported running yum will produce an error like this:
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base
Solution - Update this file CentOS-Base.repo
# CentOS-Base.repo........
Iam not sure why this is happening neither the hostnode or VM changed. All I did was reboot the hostnode and startup the Centos VM again, also note it happened with the original kernel on the VM and also the latest 6.9 kernel as of this writing as shown below.
Host Node: Centos 6.9
Kernel:2.6.32-696.6.3.el6.x86_64
Kernel: 2.6.32-042stab123.9
Same result in any kernel above........
I have never had this error on Linux and this is running FreeBSD as root:
Wed Aug 9 04:29:34 2017 us=329050 Cannot allocate TUN/TAP dev dynamically
Wed Aug 9 04:29:34 2017 us=329832 Exiting due to fatal error
The Solution
You need a kernel module that is for some reason not automatically loaded like Linux:
kldload if_tap........
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 ........
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........
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........
This is a common issue, what if a issue shouldn't have root but you want to use that user to make a full backup of a system? They of course need root access.
You can actually just give them passwordless sudo access to rsync in /etc/sudoers:
sudo vi /etc/sudoers
yourusername ALL = NOPASSWD: /usr/bin/rsync
Here is how you would execute rsync:
The key thing for the remote host is to........
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 get the following error "Installer Crashed" on 18.1 MATE 64-bit when installing by NFS/PXE. Yet it was able to at least detect and use my NIC (perhaps the driver was only activated because of PXE/NFS being used)?
When using 18.1 Cinnamon on CD the NIC does not work but the installer did succeed. However it doesn't work right, I can't login graphically and get some Cinnamon OOMerror but how can this be with 8GB of RAM straight from login?........
*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"........
Error while connecting to MYSQL: (XID 4ea7s9) Access denied for user 'root'@'localhost' (using password: YES) at /usr/local/cpanel/Cpanel/Mysql.pm line 181
Solution
This error occurs because the /root/.my.cnf has the wrong/outdated password for MySQL root user. Simply edit /root/.my.cnf with the correct user. This normally happens if you update outside of cPanel.........
Normally the below would indicate a failing or failed drive. In this case the SATA port was unplugged and sometimes the Linux kernel/motherboard even with AHCIjust don't play nice and can't handle it.
What happened is Iplugged in a new drive after removing another one. However the log shows that after the old drive was plugged in the Linux kernel kept complaining thinking the drive was there but not responding properly. This continued even with reseating........
espeak - is horrible and sounds very old and robotic
echo "hello there"|espeak
#don't know how to use
mbrola and plugins
cicero
jovie just seems to be a graphical interface to espeak
There is also sbreader/sapi
Google's Text To Speech Works Quite Well
#!/bin/bash
say() { local IFS=+;/usr/bin/mplayer -ao alsa -really-quiet -noconsolec........
This error is commonly due to Java security or TLS settings but there is a second issue with forwarded ports that also causes it.
1. Java Security/TLS Settings issue:
This article has the solution to change them all in Linux automatically
2. Port Forwarding Issue if your Avocent DSR is behind NAT/private IP........
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........
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........
convert -trim yourimage.png
That's all there is to it, very simple, clean and quick!........
Change Host="192.168.5.99" with the remote IP allowed(this is of course more secure but also cumbersome if your IP changes). You could also have a single layer of protection that specifies the IP via firewall or both (of course both are far mor secure).
UPDATE user SET Host="192.168.5.99" where Host="localhost"
or for any/wildcard
UPDATE user SET Host="%" where Host="localhost&qu........
I created a new partition table on a newly plugged in device and it caused fdisk to hang (even force kill does not work). It also may be a bad drive or some other issue because fdisk -l hangs after the first 2 HDDs (totaly of 8 HDDs on this system):
[1232879.903596] INFO: task fdisk:27176 blocked for more than 120 seconds.
[1232879.903607] Tainted: P&nbs........
I keep reading these drives are slower, but they are cheap and still SSDand work very fast for my needs.
As you can see the sequential read is 481-491MB/s, if I put them in MDADM RAID10 mode (normal RAID1) they should give me well over 900MB/s and with redundancy and being very cheap for what they offer.
[1232206.315622] scsi 8:0:1:0: Direct-Access ATA ADATA SU800&........
iptables -t nat -A OUTPUT -m addrtype --src-type LOCAL --dst-type LOCAL -p tcp --dport 3306 -j DNAT --to-destination ip.ip.ip.ip
iptables -t nat -A POSTROUTING -m addrtype --src-type LOCAL --dst-type UNICAST -j MASQUERADE
sysctl -w net.ipv4.conf.all.route_localnet=1
Make sure you substitute "ip.ip.ip.ip" for your real public IP and also the "--dport 3306" for the port you want to forward.
Finally run the sysctl command and........
md127 issue, it should be /dev/md3 per mdadm.conf
Any time something is mounted as md127 it almost always means there is no entry for this mdadm array in the mdadm.conf in initramfs (which is separate from your actual /etc/mdadm.conf).
cat /etc/mdadm.conf
ARRAY /dev/md3 metadata=1.2 UUID=b6722845:381cc94e:7a2c5b5f:8e3b7c4f
The reason for this is something strange, most Linux OS's bizarrely always keep their own copy of /etc/mdadm.con........
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........
rm /vz/lock/1200.lck
rm: remove regular file `/vz/lock/1200.lck'? y
vzctl start 1200
Container already locked
vzctl start 1200
Starting container ...
vzquota : (error) can't lock quota file, some quota operations are performing for id 1200
vzquota on failed [7]
vzquota off 1200
vzctl start 1200
vzquota on 1200
root@rttbox ~]# vzquota off 1200
vzquota : (........
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........
This is a common mistake but many people do not realize this function comes from mysql itself, so therefore you need an active mysql connection open.
Usually the string will be empty and null when you call it from outside of the database connection portion of your code.
eg. an example of the wrong way and creating a null/empty string
$var = mysql_real_escape_string($myself)
mysql_connect();
// returns n........
openvpn 2.3.10-1.el6 issues
in the .conf
auth-user-pass-verify "passwordcheck $username $password $untrusted_ip" via-env
auth-env does not work correctly in OpenVPN 2.3:
Sat Apr 23 02:30:22 2016 - $username - $untrusted_ip - login failure
But OpenVPN 2.2 does work as expected.
It could be that the specified script automatically receive........
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........
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 have two lines on my PAP2T and the only thing that solved this problem rather instantly was to change the line with the problem to using port 5060 instead of 5061 (so both lines are using port 5600). Note that I am not forwarding either port in my router either.
Some of the symptoms of this problem for me were the following:
No dialtone or it would take several tries.
You answer a call but the phone keeps ringing (takes a few times t........
grub> root (hd0,0)
root (hd0,0)
Filesystem type is ext2fs, partition type 0xfd
grub> setup (hd0)
setup (hd0)
But if you do:
root (hd1,0)
setup (hd1)
it does work, I think hd0/sda had a GPT partition that was not removed properly (what I did was just dd bs=512 count=1 the partition table from another drive since the partition table should be identical).
Checking if "/boot/grub/........
INSERT INTO articles_backup
SELECT * FROM articles WHERE articleID="118"
It is so simple we always recommend people do this when updating their database so you always have a backup.
The above inserts the copy into the table "articles_backup" which has an identical structure.
It selects the entry from "articles" where the articleID is "118" but of course you can adapter yours to whatever the situation is.........
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........
#solution
Edit /etc/yum.repos.d/openvz.repo
For the first two entries comment out #mirrorlist and uncomment #baseurl and then it worked
openvz yum problem Centos 6.5 cannot find file on mirror:
yum update
Loaded plugins: fastestmirror
Determining fastest mirrors
* openvz-kernel-rhel6: mirrors.ustc.edu.cn
* openvz-utils: mirrors.ustc.edu.cn
base ........
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........
Use netstat with the -anpe option. The e option shows the inodes and I do not know if it will always work or if it was by fluke but I was dealing with dozens of SSHsessions and needed to know which session was related to which forward (the PIDs of the SSHand SSHD did not match etc...)
Notice the "59560675" and "59560762" those are almost identical, if you find two sets that are nearly identical except for the last 3 digits they may match (in my ca........
-------------------------------------
ProCurve J4903A Switch 2824
Software revision I.10.77
Copyright (C) 1991-2009 Hewlett-Packard Co. All Rights Reserved.
RESTRICTED RIGHTS LEGEND
Use, duplication, or disclosure by the Government is subject to restrictions........
rm -- --filename
Ironically if the solution is two leading dashes as shown above but this applies for other stubborn file names.........
Motherboard: Gigabyte GA-3CESL: http://b2b.gigabyte.com/products/product-page.aspx?pid=2658#dl
Dell Part Numbers for the motherboard: R1232 R1232L R2232S SERVER MOTHERBOARD GENUINE 408P9 CN-0408P9
GA-3CESL Manual Download here
RAMSlots: 16 (8 controlled by each CPU)
RAMType: DDR2 ECC 5300P........
[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........
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........
This is basically caused by upgrading PHPto a new version like 5.4 when you had 5.2 before and an old version of Joomla. The only solution is to upgrade Joomla or downgrade PHP, both of which can be a pain.
Strict Standards: Non-static method JLoader::import() should not be called statically in /home/userdir/public_html/libraries/joomla/import.php on line 29
Strict Standards: Non-static method JLoader::register() should not be ca........
You need to use the Samsung driver but specify it as a CLP-360 (this is what I used for my CLP365) and incidentally most of these units look identical on the outside on inside (I've been buying whatever the latest C300 and now 400 unit for years which all seem the same with slightly different features that I never use).
The solution
Once again try specifying earlier models and revisions if the printer doesn't print (it will say it's been sent to the printer bu........
First of all if you're getting this error it is a result of extreme database activity. If you aren't expecting it or it doesn't make sense to you 99% of the time this is a database driven script being exploited (some common examples I see often are things like phpBB being hit by dozens, hundreds or thousands of bots making constant DB write requests).
The easiest way to identify this is to restart MySQL and then run the third party tool "mtop" and you'll see all........
The most common solution is to use the /etc/postfix/header_checks but this is a big problem.
Why is header_checks a problem? Because it does it to all mail whether incoming or outgoing and whether authenticated or not. We of course want as much header information for incoming as we can get for many reasons but many organizations want to secure and make their mail clients as secure as possible.
I adapted this solution to the client's custom config, they are configur........
Unable to mount iPad 4
Unhandled Lockdown error (-4)
This is because you need the libimobiledevice-utils package installed and a newer version of it.
My older Ubuntu 10.10 uses a version that does not have "idevicepair" which seems to work perfectly and automatically with newer versions of the library.
Basically if you install the above library it should be plug and play and if your imobiledevice-utils doesn't have 'idevice........
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........
It was hard to find this as I find most online payment processors don't just put the basic information in plain view.
Remember to set your sid (your seller id). The below can easily be turned into a scripted PHP template to integrate into your own custom or existing payment solution.
http://help.2checkout.com/articles/How_to/How-to-Sell-Recurring-Products-with-2Checkout/........
error: Failed to create domain from /home/kvm/kvm101/kvm101.xml
error: cannot open file '/dev//dev/kvmcontainer/kvm101_img': No such file or directory
This is caused by what we consider a quark in SolusVMthat Ihelped a client with.
SolusVMhas as config for the "LVMvolume name" and does not enforce any convention.
Naturally most technical people would use the actual path eg "/dev/kvmcontainer".
However th........
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 can happen when you install RPMForge or other repos with the wrong architecture and here's how you fix it (simply uninstalling won't usually fix it):
solution
yum clean all
yum -y install openvpn
Loaded plugins: fastestmirror, presto
Loading mirror speeds from cached hostfile
* base: mirror.its.sfu.ca
* extras: centos.mirror.nexicom.net
* rpmforge: mirror.cpsc.ucalgary.ca
* up........
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.........
ssh -L 5905:localhost:5900 root@yourserver.com
The "-L" means to create a port forward to a port on your server.
The 5905 means the port on your computer that will be used to access the port 5900 on the remote server.
localhost is the IP that you use to access the port forward (you can change it to 0.0.0.0 which will be all IPs on your system/computer but localhost is good for security and privacy unless a whole network of people need access).........
Kernel panic - not syncing: Attempted to kill init!
Pid: 1, comm: init Not tained: 3.2.51-3.el6.x86_64 #1
Call Trace:
panic+0x8c/0x1a2
forget_original_parent+0x34d/0x360
exit_notify+0x12/0x140
do_exit+0x1d8/0x400
do_group_exit_+0x50/0xc0
sys_exit_group+0x12/0x20
system_call_fastpath+0x16/0x1b
panic occurred, switching back to text console........
VBox/Virtualbox solution to NS_ERROR_CALL_FAILED error
This is likely because you have 2D/3D acceleration enabled and your card doesn't support it.
Eg. you switched video card drivers or video cards that did support it.
The funny thing is that you CANNOT disable those options as they are "greyed" out in the VBox client GUI.
The config file has to be manually changed and fixed with these options "accelerate3D="false" accelera........
./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........
Starting container...
vzquota : (error) Quota on syscall for id 42131: No such file or directory
vzquota on failed [3]
Solution
cd /var/vzquota
mv quota.42131 quota.42131-disable
vzctl start 42131
Starting container...
Initializing quota ...
Container is mounted
Adding IP address(es):
Setting CPU units: 1000
Container start in progress...
........
Browse to this directory: ~/.config/libreoffice/3/user/backup/........
I just realized I have some blank users which I deleted butI can still login to this dummy account without a password for some reason.
mysql -u -p
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 5
Server version: 5.1.69 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation an........
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........
The error itself "mkdir(): Too Many Links" is not very useful, but I'll translate it into plain English.
It means you've reached the filesystem's limit of how many directories can be created in a single directory.
In this case for ext3 the limit is 32000 and it was exceeded.
What's the solution?
The simple solution is to move those directories into more subdirectories possibly sorting them by date, alphabet or numerically.........
Image -> Mode -> RGB........
Make sure that the Page mode is set to landscape and that the columns fall within the margins/boundaries, otherwise this is why there will be blank pages (Print Preview will show you this too).........
openoffice calc landscape printing problem
OpenOffice.org 3.2.1
OOO320m19 (Build:9505)
ooo-build 3.2.1.4, Ubuntu package 1:3.2.1-7ubuntu1.
It's not extending the printing and margins all the way to the edge even when setting the Page and print settings to Landscape
Solution (incorrect margins set under Page):
*Check the margins, my right margin was like 14cm!........
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 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:........
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
bind-address=127.0.0.1
The key is "bind-address", set that to 127.0.0.1 and no one from outside the server can connect.........
mysqldump: Couldn't execute 'show create table `general_log`': SHOW command denied to user 'user'@'localhost' for table 'general_log' (1142)
One of my clients almost found out the hard way, here is an unlikely situation that happened.
1.) Years ago the client had another VPS to which they backed up a BLOG nightly to an .sql file, what they forgot is that the file also contained all databases (they used the --all-databases option but forgot). So imagi........
foreach ($_POST as $key => $value) {
if ( $key != submit )
{
$values.="$key=$value<........
This is useful for developing a lot of applications, I'm putting it here to keep it handy for myself and hopefully others:
Choose CountryCanadaJapanUnited StatesUnited KingdomAfghanistan........
On occassion and from a variety of networks and clients, Sent messages don't get saved.
I'm wondering if these log messages could be why:
May 3 14:16:39 mail.box postfix/smtpd[5195]: connect from 192.168.1.58
May 3 14:16:39 mail.box postfix/smtpd[5195]: SSL_accept error from 192.168.1.58: -1
May 3 14:16:39 mail.box postfix/smtpd[5195]: lost connection after CONNECT from 192.168.1.58
May 3 14:16:39 mail.box postfix/smtpd[5195]:........
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?........
Kernel panic - not syncing: Attempted to kill init!
Pid: 1,comm: init Tained: G I------------- 2.6.32-358.el6.x86_64 #1
Call Trace:
[] ? panic+0xa0/0x16f
[] ? do_exit+0x862/0x870
[] ? fput+0x25/0x30
[] ? do_group_exit+0x58/0xd0
[] ? sys_exit_........
-bash-3.1# shutdown -rn now
Connection to localhost closed by remote host.
Connection to localhost closed.
Sometimes I work with embedded systems/custom kernels without any of the fancy init scripts and other common Linux basics that most would expect. This means that often the "reboot" command (which uses an init script) will never work, not only that but it will hang the server and a manual power cycle or reboo........
arp -a
syst (192.168.1.122) at 21:96:43:3a:62:a2 [ether] on eth0
arp -d 192.168.1.122
If you get an error do:
arp -d 192.168.1.122 -i eth0
Sometimes the arp cache just won't clear either, some say it should automatically but there are cases where the above doesn't work. I believe it may be that some network applications are keeping the entry alive but this is just a guess.........
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........
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........
ERROR 1045 (28000): Access denied for user 'contentmanager'@'localhost' (using password: YES)
For fun I thought I'd reset the password:
GRANT ALL ON thecontent.* TO contentmanager IDENTIFIED by 'dfdfsdfdsfsdfsd';
ERROR 1470 (HY000): String 'contentmanager' is too long for user name (should be no longer than 16)
This is ridiculous that this new version has some bizarre 16 character username limit and not only that but i........
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
&........
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........
This was very annoying but has a simple fix, I had an echo and the voice quality was absolutely horrible (it sounded like tin cans under water) if that helps describe it. It was extremely distorted.
The simple Skype sound quality solution
Go to "Options" -> "Sound Devices"
Disable the "Allow Skype to automatically set my mixer levels"
After doing this the sound qua........
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........
PDOException: SQLSTATE[42000] [1044] Access denied for user 'db_user'@'localhost' to database 'dbname' in lock_may_be_available() (line
167 of /home/user/public_html/includes/lock.inc).
The username and password were correct but some reason CPanel added the user with no permissions! Edit the user's permissions to include "All" from Cpanel or MySQL and that is the solution.........
gocr works great and it's simple, just invoke it like so:
gocr filename.png
The output will be printed to the screen.
My only complaint/concern is that even with standard terminal output (not scanned) from a printscreen, gocr does make mistakes by inserting extra spaces where they don't belong, mistaking letters for numbers etc.. but it's definitely enough to be readable and figure out what you're looking at.
I haven't tested yet with scanned input........
These were caused by a bad stick of Corsair RAM
[] free_hot_cold_page+0xfc/0x150
[] __pagevec_free+0x14/0x1a
[] release_pages+0x127/0x12f
[] __pagevec_release+0x15/0x1d
[] __invalid_mapping_pages+0x120/0x156
[........
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'll start by showing some problems in the logs:
[2011/08/07 16:22:06, 0] param/loadparm.c:8569(process_usershare_file)
process_usershare_file: stat of /var/lib/samba/usershares/movie failed. Permission denied
[2011/08/07 16:22:06, 1] smbd/service.c:676(make_connection_snum)
create_connection_server_info failed: NT_STATUS_ACCESS_DENIED
That means you don't have permission to access the fi........
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 a dying drive that smart thought until it totally disappeared was a good drive, and actually all parameters did look fine but this system was causing my system to lockup and other bad behavior:
=== START OF INFORMATION SECTION ===
Device Model: WDC WD20EARS-00MVWB0
Serial Number: WD-WMAZ20139
Firmware Version: 50.0AB50
User Capacity: 2,000,398,934,016 bytes
Device........
It's weird because I have a nearly identical box and setup and I can update the ovzkernel-PAE* just fine but on this box it doesn't work.
I only get this error with the openvz.repo and not others such as Centos-Base.repo
With my other server it works normally:
================
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package ovzkernel-PAE.i686 0:2.6.18-238.12.1.el5.0........
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........
telnet localhost 80
Trying localhost...
Connected to localhost).
Escape character is '^]'.
^]
telnet>
A lot of people don't know that "^" means the Control Key, so many times you can't force quite telnet without knowing that (Ctrl + C won't always work).
*Just use Ctrl + ]
Ihope this saves some time and frustration from some people.........
My Samsung drive failed on me, at first I thought it was the enclosure but a direct SATA connection causes the same problems for discs that are inserted. It will work fine for a few minutes but then starts spewing the errors below.
I've never been a fan of Korean made optical drives and have always had trouble with them. The problem is that I don't believe NEC and Lite-ON make drives anymore, and I considered them the leaders.
Apr 7 11:58:48 bo........
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........
My mother needed a new laptop and I recommended her the same one I would have bought myself or my wife, that means the cheapest possible laptop with the most features for the money.
This HP shines at this price point and one thing that made me stay away from buying more and recommending HP/Compaq was the poor battery life. Not anymore, this model has an industry leading up to 4 hours of battery life.
Key Factors for Choosing It:
HDMI Out........
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........
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 admitted the server was not working and to wait for 24 hours. I waited for 4-days, after which they sent an e-mail saying my service was being disabled for SPAM ...(when SolusVM shows 0kb of traffic). Th........
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........
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........
Amarok won't play songs, keeps skipping to the next
Some say install install phonon-backend-xine
but it was already installed automatically, obviously that's not the problem or solution.
Settings -> Configure Amarok
Playback: Configure Phonon
Audio Output: Music
It should show your different audio interfaces, choose Pulse Audio and move it to the top of the list, do the Apply, OK and manually quit Amarok (remember to close it from the tra........
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........
The first thing you need to remember is not to check from the same host/server itself. This is a silly mistake I made, the reason is that many mailservers and especially postfix are configured to allow relaying from the localhost/same host. If you do that you'll get a false positive.
*Make sure you test from another host/system than the mail server itself!
telnet yourmailserverhost.com 25
220 Courier (FreeBS........
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........
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.........
tar include hidden files such as .htaccess
just add . to the path eg.
tar -czvf tarfile.tar.gz /home/directory/.........
mysqldump does not include CREATE DATABASE statement
you need the --databases option
"--databases" is misleading, it implies in the documentation that this is a list of databases to be dumped, it should be clear that uses this command in conjuction with dumping a single database also adds CREATE DATABASE and is the only way to get the database to automatically create itself.........
Jan 16 04:02:03 centosbox syslogd 1.4.1: restart.
Jan 16 04:07:34 centosbox kernel: INFO: task updatedb:20771 blocked for more than 300 seconds.
Jan 16 04:07:34 centosbox kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jan 16 04:07:34 centosbox kernel: updatedb D F78BE050 6476 20771 20766&n........
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........
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'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........
yum exits in the middle
The problem is this VPS seems to be an OpenVZ template from HyperVM. The only way to make it work was to disable i386 packages since this was an x64 kernel. That shouldn't be necessary but it was the only way to make yum stop quitting after the first package or two. I couldn't find any issue by checking the logs either.
echo y|yum install vim-minimal telnet expect jwhois net-tools slocate iptables elinks gawk
L........
first container would not come up:
Starting CT 2333:
service vz stop
OpenVZ is locked [FAILED]
2010-11-29T23:26:23-0800 vzctl : CT 2333 : Starting container ...
2010-11-29T23:37:21-08........
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*........
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........
After an upgrade wine wouldn't open anything, not even the pre-installed notepad.
There are no wine logs and nothing is mentioned in any standard log file about why.
I finally decided to run wine from the shell and see what's going on:
wine client error:0: version mismatch 398/402.
Your wineserver binary was not upgraded correctly,
or you have an older one somewhere in your PATH.
Or maybe the wrong wineserver is still running?........
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........
Always make a backup of the original file before trying this, I find this kind of thing when updating IPs etc.. to use a script.
Where the old IP is "192.168.5.8" and the new IP is "10.10.5.8"
sed -i s/192.168.5.8/10.10.5.8/g testdomain.org.db
The -i with sed means "inline" meaning we edit the file directly, but without the -i we could just use >and output the results to another file or do whatever else we wanted.........
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 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........
I was creating a RAID array and got this error: mdadm: /dev/sda1 is too small: 0K
mdadm: create aborted
Of course sda1 is not too small, both partitions sda1 and sdb1 are identical in size:
Disk /dev/sda: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000
Device Boot Sta........
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
&........
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 was unbelievable how much the Xen kernel slows things down, keep in mind both tests were done on the hostnode, one was with the Openvz-Xen hybrid kernel and the other was just OpenVZ. You can see the performance difference is nearly 300% better when not using the Xen kernel.
OpenVZ-Xen Kernel Test Results (I was wondering what was wrong/so slow with my Core i5!)
# # # # # #&n........
I took an educated guess because it kept happening at the same spot when loading the XP install. I thought it was the hard drive or motherboard.
But it turns out my heavily used but loved NEC 3500 DVD-RW drive was the culprit. After disconnecting it and swapping it for another much beloved Pioneer DVD-RW, everything has gone smoothly.
I never ran into this or many issues because I've hardly used this drive since moving it to another Desktop years ago. I actua........
This is a very simple solution, but most guides out there make you login twice (once to scp the key) and once to put the key in authorized_keys. There's no need for that.
If you don't already have a ~/.ssh/id_rsa.pub just type "ssh-keygen -t rsa" and keep hitting enter until it's done :)
Just use this code to easily enable passwordless login with SSHD
key=`cat ~/.ssh/id_rsa.pub`;ssh user@192.168.5.25 "echo $key >> ~/.ssh/auth........
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........
Apr 30 17:07:07 localhost kernel: [12265558.582378] r8169: eth0: link up
Apr 30 17:07:07 localhost NetworkManager: (eth0): carrier now ON (device state 1)
Apr 30 17:07:08 localhost kernel: [12265559.237961] r8169: eth0: link down
Apr 30 17:07:08 localhost NetworkManager: (eth0): carrier now OFF (device state 1)
Apr 30 17:07:11 localhost NetworkManager: (eth0): carrier now ON (device state 1)
Apr........
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........
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........
In Debian based distros:
apt-get install jabber
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
fakeroot dkms
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
jabber-common
The following NEW packag........
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........
Here are the results, it is Sempron 3000+ AMD Mobile, 500Gig HDD, 512MB RAM with shared ATI Radeon graphics.
# # # # # # # ##### ###### # # #### # #
# # ## # # # #&nb........
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 $OPENSSL not foundn";
}[/code:1:1fd0f3abbe]
I don't get itI can clearly see the contents of /usr/bin by using the PHP system fu........
rsync bash script
[code:1:722d8a25c1]#!/bin/bash
# config ---------------------------------
# two methods
# from = receive data from another server
# to = send data to another server
rsync_method=from
rsync_ip='192.168.5.18'
local_dir='/home/backupguy/backups'
remote_dir='/home/backup'
free_space_bin='/home/backups/freediskspace.sh'
# config end ------------------------------
if [ '$rsync_me........
Javascript window.onLoadThis can be used anywhere on an HTML page, my favorite (since body onLoad is not an option for me) is to use:
window.onLoad = functioncall();
Eg. to calculate the value of a form, you want to use the onLoad at the end of the form, as things are called in order of course........
SSH automatic login without passwordlocal> ssh-keygen -t rsa -f .ssh/id_rsa
-t is the encryption type
-f tells where to store the public/private key pairs. In this case, the .ssh directory on home is being used
A password will be asked; leave this part blank, just pressing
Now, go the .ssh directory, and you will find two new files: id_dsa and id_dsa.pub. The last one is the public part. Now, copy the public key to the serv........
Photoshop Center A SelectionYou should have the item in it's own layer, select the layer and use CTRL+A to select the layer.
Then look for the alignment controls near the top of the screen (under the menus)
Use the Horizontal Center and Vertical Center and then your item will be perfectly centered.........
CREATE Database/Granting PrivilegesCREATE your first database
Code:
[code:1:0668cd8e74]CREATE database myfirstdb;
[/code:1:0668cd8e74]
CREATE a user for your first database
This one creates the user 'sqladmin' and gives them 'usage' on your new database 'myfirstdb'
Code:
[code:1:0668cd8e74]mysql> GRANT usage on myfirstdb.* to sqladmin@localhost;
Query OK, 0 rows affected (0.00 sec)[/code:1:0668........
Setup Static IP Address ONBOOTAssuming you are using eth0
Note this will work for any version of CentOS and basically any version of Redhat Linux or Redhat based distribution.
You would need to create a new file
[code:1:02f8d34c30] /etc/sysconfig/network-scripts/ifcfg-eth0:0[/code:1:02f8d34c30]
DEVICE=eth0:0
the ":0" at the end specifies alias 0 we could actually change this to ":99" or "........
Updated to Version 3.8 and can't loginSSHD accepts my password but then hangs at "Last login: Wed Sep 13 21:30:02 2006 from"
This occurred during a yum update after upgrading my release, installing the new kernel and rebooting.
I got kicked out of sshd after seeing the following during yum update:
telnet 100 % done 85/476
tux 100 % done 86/476
ntsysv 100 % done 87/476
rpmdb-redhat 94 % done 88/476........
Asterisk Agent Login ProblemUsing the AgentCallbackLogin function I couldn't login
I knew I had my agents setup properly in agents.conf so why couldn't I login?
The reason is because agents.conf was missing the [b:994d7a34af][agents][/b:994d7a34af] context!
I just added [agents] above the existing agent declarations and then I was able to login as expected.
It took a lot of figuring out and reading though!........
Backup Shell Script[quote:aaa4b0b165]#!/bin/sh
date=`date -I`
mysqldump --all-databases | gzip > /var/backup/backup-$date.sql.gz
[/quote:aaa4b0b165]
Something like that could be useful as a cronjob to locally or remotely backup your databases........
It's not all about the speed.I'd also thought I'd mention that speed is not everything. Routing is the key, because if one router you hit is slow then it doesn't matter how fast your connection is. I have found that locally, Telus has much better routing than Shaw (although I have not yet tested their new DOCSIS network).
There are also some countries such as Sweden that offer high speed connections, but the high speed only applies locally. The reason is that man........
NEC ND-3500A is great!I just picked up an NEC 3500A a few weeks ago and I love it.
It is a great all in-one optical drive solution.
It can burn DVD/+R-R at up 16x, read at 16x and rewrite at 4x and CD-R at up to 48x!
Not bad, but the impotant part is that it delivers consistent high quality burns and the drive is as quiet as I could ask it to be.
It's also convenient that it has a lot of hacked firmware for overspeeding of........
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........
Linux Kernel v2.6.30.3
102220 blocks
CHK include/linux/version.h
CHK include/linux/utsrelease.h
SYMLINK include/asm -> include/asm-x86
CALL scripts/checksyscalls.sh
CHK include/linux/compile.h
CC drivers/net/igb/igb_main.o
drivers/net/igb/igb_main.c: In function `igb_up':........
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........
This really is a difficult and confusing process for non-Mandarin speakers, but here's what I've done and learned so far:
You can purchase an "M-Zone" China Mobile pre-paid SIMCard from almost anywhere but I tried to purchase mine from Suning (a large electronics dealer) hoping they would be able to help me or answer my questions but my plan didn't work out at all. At Suning once I found someone who spoke some English they gave me the 55 RMB M-Zone China Mobile P........
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........
In Newer Linux Distros This Way Is Easiest and works on newer versions like Ubuntu, Mint, Fedora, Centos, Debian etc.
#if you are missing timedatectl this in newer distros like Ubuntu/Mint/Debian and are using a container like Docker then do "apt install systemd"
timedatectl set-timezone America/Vancouver
Replace the America/Vancouver with the correct timezone.
To see the list you can just type "timedatectl set........
This is something that annoys a lot of people, fortunately the Redhat style OS's are the most simple in this respect. I disagree that Debian's way makes sense, it is more of a hackish approach in how they implement iptables.
Anyway, for those who are using Redhat/Centos style OS's it is very simple.
Set your rules from the shell/command prompt and to save the iptables firewall rules so they are remember/loaded on boot just run this command:
service iptables........
This happened during a sync of my iPhone while installing some apps. This usually happens to non-jailbroken iPhones who are trying to install non-Apple approved software OR jailbroken phones who haven't done the "Sync update".
How to fix this error and get the Sync Update
Open Cydia - Manage - Sources - Edit
Add this source: http://cydia.hackulo.us
Then under the section "Hackulo.us" install "Ap........
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........
Server not using user level security and no password supplied.
tree connect failed: NT_STATUS_WRONG_PASSWORD
That happens when trying to use smbclient to connect to a share. The weird thing is that I can authnenticate just fine from Windows XP.
It is partially my mistake, I forgot this share does have a password. I've tried authenticating with the correct user and also with "Guest" because this works in Windows. In Linux I ........
Ithink there has been a lot of negative press towards Rackable Systems. We will give their new solution credit that it is marketed very well, and comes prepackaged and ready to go.
But let's cut through the hype of both sides, the people who love this concept and the people who hate it.
What Rackable Systems have done is a first, to minimize space, power and costs into small servers. This is great, and many companies have already built their own servers based........
At this time we can't resolve Enom's website and all DNS requests to their 4 primary name servers are failing, although the hostnames themselves still resolve:
Name Server: DNS1.NAME-SERVICES.COM
Name Server: DNS2.NAME-SERVICES.COM
Name Server: DNS3.NAME-SERVICES.COM
Name Server: DNS4.NAME-SERVICES.COM
Name Server: DNS5.NAME-SERVICES.COM
You would really think Enom, bein........
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........