• When is it time to leave your VPS/VDS Cloud Hosting Provider?


    When Is It Time to Leave Your VPS, VDS, and Dedicated Server Provider? Choosing the right hosting solution—be it Virtu........
  • Proxmox install issue cannot see the buttons or install wrong / bad resolution cannot see the entire screen problem solution


    If you are using a hypervisor to test Proxmox (eg. Vbox) then changing the video card/display adapter can fix it. For example VboxSVGA causes the issue but switching to VMSVGA fixes it. For example VboxSVGA causes the issue but switching to VMSVGA fixes it. ........
  • apache2 httpd apache server will not start [pid 22449:tid 139972160445760] AH00052: child pid 23248 exit signal Aborted (6) solution Mint Debian Ubuntu Redhat


    If you get this error, it is often because you have configured Apache with modules that weren't actually installed. Eg. you try to load the PHPmodule but didn't actually install the apache2 php module, so the server can't start. In general, this error can often be caused by issues with problematic modules and/or Apache being configured for modules that have not actually be installed (eg. libapache2-mod-php) is missing. The above results in this less than obv........
  • Docker Tutorial HowTo Install Docker, Use and Create Docker Container Images Clustering Swarm Mode Monitoring Service Hosting Provider


    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.........
  • Unable to mount location Failed to retrieve share list from server: Connection timed out - Samba/Linux Filesharing Not working Ubuntu Mint Linux Solution


    So you're trying to browse to a properly configured Samba share but you get this error: Unable to mount location Failed to retrieve share list from server: Connection timed out If your config is right, it can be due to a protocol miss-match where your client has not enabled SMB3 but by default the other side (server) has enabled it. You can test this out to see with the smbclient tool........
  • How To Speed Up Linux Ubuntu and Debian Based Computers By Improving CPU Performance and Changing the CPU Governor


    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........
  • Bind / named not responding to queries solution


    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";........
  • Ubuntu/Gnome/Mint/Centos How To Take a partial screenshot


    By default printscreen or alt print screen will get the whole desktop or the application in focus, respectively. But what if you want to select a portion of the screen? gnome-screenshot: ksnapshot compiz This is a nicely integrated solution sudo apt-get install compizconfig-s........
  • How Does Cisco CUCM (Cisco Unified Communication Manager) Work?


    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.........
  • Proxmox understanding the directory structure and why an NFS datastore appears to be missing files/isos


    Proxmox at the root of your storage creates and "images"and "templates/iso" folder for VM images and iso's respectively. It ignores files in any other location.........
  • VMWare 6.7 VCSA VSphere ESXi Management SSO Install Guide on Linux using the CLI


    #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........
  • Apache htaccess Custom ErrorDocument not working properly for root home page 403 Error Issue and Solution


    So I have a domain "testdomain.com". Inside test domain.com's root is the following .htaccess: Options +FollowSymLinks -Indexes ErrorDocument 403 /launch/index.html Order Deny,Allow Deny From All Allow From 192.168.1.2 When you visit anything other than root things work fine. Eg. if you visit http://testdomain.com/somedirfile.html It will show the right error in /launch/........
  • css responsive images


    add this style="background-size: contain;max-width: 100%; height: auto;" to your img code. Example: ........
  • responsive table without changing much code solution


    So you've got a responsive site with tables but it breaks them so anything not viewable on the screen is now cut off. Here is a simple solution that will allow users to scroll horizontally so they can see the whole table: &........
  • Linux shows my drive as being dead is it really? Buffer I/O error on device sdb, logical block 0 sd 3:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00


    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........
  • Bing/Microsoft Ads flex.atdmt.com causing problems for ad tracking and site loading


    I was asked to troubleshoot why a site wasn't loaded or responding properly, it turned out they were using some old javascript tracker from Bing/Microsoft that is no longer valid or working. You have to wait forever for it to time out but it really did disrupt the functionality of a very important site: flex.atdmt.com If you have the above code in javascript on your site remove or comment it out.........
  • unfortunately lg keyboard has stopped - LG Phone Keyboard Issue


    This seems to effect many other LG phones , specifically their keyboard app and basically makes your phone unusable where you cannot use the keyboard because that message keeps popping up and the keyboard will not load. unfortunately lg keyboard has stopped solution: 1. Go to your settings and manage apps and find the LG Keyboard app: 2. Stop it from running, delete all data and clear all cache. After the above you will probably find that your........
  • Debian sources.list examples


    Based on this from Debian The 'distribution' can be either the release code name / alias (wheezy, jessie, stretch, sid) or the release class (........
  • Centos automatic ifcfg-eth0 scripts based on list of IPs from bash


    It's a basic script that reads the file "ips.txt" in the current directory and then creates a corresponding ifcfg file     #!/bin/bash GATEWAY=192.168.1.1 NETMASK=255.255.255.0 device=eth0 counter=0 for ips in `cat ips.txt`; do........
  • Ubuntu Linux Slow/Delayed SSH ping response Solution


    I've only ever seen this in Ubuntu for some reason and it is because of the /etc/nsswitch.conf settings. So the issue is that if the hostname's reverse DNS cannot be found that you need to go back to DNS which was not the default in this nsswitch.conf file for some strange reason. Edit /etc/nsswitch.conf and replace your "hosts" line with this: #hosts: files dns mdns4_minimal [NOTFOUND=return] mdns........
  • phpBB create new email hash manually when modifying or adding user manually directly through MySQL


    Many may ask why would you need to do this? When upgrading from phpBB 2 to 3 the conversion does not keep the admin user you create. If your old admin user has an email address associated that no longer works or is accessible this makes it impossible to reset the admin password. Some may just say "I'll just manually edit the e-mail address" but it won't work and phpBB will fail to find that user if you don't update the "user_email_hash" field but how do........
  • Ubuntu 10.10 100% CPU from apt-get solution


    When manually running it for some reason it decided to ask for/use the CD as a source whichInever set. Disabling the CD as a source stops this from happening, otherwise apt-get will keep respawning and use 100% CPU.........
  • Sipura / Linksys PAP/VOIP/SIP Adapter Issue Can't receiving incoming phone calls and you're behind a NAT router (99% of people)? solution


    Sipura / Linksys PAP/VOIP/SIP Adapter Issue Can't receiving incoming phone calls and you're behind a NAT router (99% of people)? 1. Login to the adapter. 2. Click on "Advanced" (location varies but usually somewhere on top) 2. Click on "SIP" 3. Scroll down to "NAT" (usually at the bottom). You'll find 2 columns with 4 rows of drop-down boxes (they'........
  • MySQL Allows blank user with no password to login


    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........
  • CPanel How To Create/Edit Default Nameservers


    CPanel ->Basic cPanel &WHMSetup At the bottom you'll see them, set the nameservers you want to use and the corresponding A record if needed. Then all new domains will use those settings/nameservers. It's strange that there's no section for this specifically.........
  • GoDaddy How To Register and Create/Use Your Own DNS Name Servers


    http://support.godaddy.com/help/article/668/registering-your-own-nameservershosts?pc_split_value=1 Log in to your GoDaddy Account. Click on "My Account" at the top left. Click on "Domains". Click on the "Launch" button for the domain you want to create the nameservers for. Find........
  • Antec ECO450C Crashing


    Crashing with a RAID 1 array and when burning a CD. Screen goes blank (no video signal) and system stops responding during heavier loads. Is this a defective power supply or is it possible I have too many devices connected to the same rail? How can I verify/troubleshoot this?........
  • init: tty (/dev/tty2) main process (1031) terminated with status 1 init: tty (/dev/tty2) main process ended, respawning


    After some fsck issues I can't boot my Centos 6.4, this just keeps repeating over and over. init: tty (/dev/tty2) main process (1031) terminated with status 1 init: tty (/dev/tty2) main process ended, respawning Disabling SELinux through Single User mode fixed this.........
  • Ubuntu/Linux disable extra Mouse Buttons Microsoft Comfort Mouse 4500


    I find it very annoying that this mouse has buttons on the side where you grip it and the left one goes back in the browser and the right one goes forward. Imagine if you're filling out a form and hit it, most forms/websites have no protection against it. Source: http://ubuntuforums.org/showthread.php?t=2065400 Here's how I fixed it with xinput, it's too bad there's no good standard GUI to........
  • kvm cannot boot xen guest using lvm


    This booting error is because the Xen PV guest image uses the Xen kernel, this is not compatible with anything but a host running a Xen kernel. I did a kpartx -av virtual.img and then it created some partitions that showed up in fdisk. I mounted it and did a chroot into it and removed the xen kernel and installed a normal kernel but Xen still shows the same kernel in Grub (only the Xen one). This is strange but it seems like this Xen PV guest has some sort of hidden or........
  • CPanel error: "Your SSL certificate failed to install on your site."


    This error in my experience is user error although CPanel doesn't help, this message doesn't give you much to go on. Let's talk more about the process of setting up SSL with CPanel. Your site must have a dedicated/non-shared IP to even have the option of creating an SSL Certificate. You must create a Private Key (do not delete this private key!) You must create a CSR (Certificate Signing Request) Use CSR to create cert........
  • postfix how to send to multiple recipients default limit of 1000


    The size of the message you are trying to send exceeds a temporary size limit of the server. The message was not sent; try to reduce the message size or wait some time and try again. The server responded: 4.5.3 Error: too many recipients. We set this in main.cf: smtpd_client_recipient_rate_limit=0 We didn't specify it before and the default is said to be 0/unlimited and it still didn't change anything.........
  • Xen non-HVM container won't work/boot anymore


    One of my test Centos 5 containers was on a partition that filled up and it threw all sorts of errors and stopped responding but now I can't boot it again anymore. All the console shows is the Linux Penguin on the top left corner and the xm console says "usbcore: registered new driver hub" and has halted there. Centos 5 Xen container stuck/frozen won't boot on "usbcore: registered new driver hub" Another great way of troubleshooting is booting fro........
  • What's Needed To Fix Linux


    I really am a Linux fan but my comments here may not show it. Although I'm quite familiar with Linux CLI to administer servers, I find Linux GUI OS's like Ubuntu at times very clunky. This is partially because there's no such thing as a "self-made" Linux from scratch where the UIwas designed by a single team. Linux is made up of several different projects that are generally completely separate and this lack of integratiion is a key issue that makes things f........
  • iPhone Restore/Backup Location of Notes and Contact/Address Book


    *Make sure that the ownership is 501.501 or mobile.mobile when copying back (especially if using ssh or sftp as root on the iPhone) otherwise things will break. Eg. the contacts will be blank even after trying to update due to incorrect ownership/permissions. iPhone Notes Location/Restore: /private/var/mobile/Library/AddressBook AddressBookImages.sqlitedb AddressBook.sqlitedb Once you restore the contacts and restar........
  • vi problem in Ubuntu/Debian distros when editing up,down,left,right arrow keys produce A,B,D,C respectively


    This is very annoying, the only known fix is to install vim apt-get install vim After that everything works as normal.........
  • screen Cannot open your terminal '/dev/pts/2' - please check.


    The solution to this screen issue is simple. This happened to me in Centos 5 as a user, but I also su'd to it and I don't have any password for it. I've read some people say this is more common when su'ing. The solution is simple though, just give others rw access to the corresponding pts whether it's 0,1,2 etc..: As root do chmod o+rw /dev/pts/2 ........
  • Kernel/make compilation time and how to improve compile times/compile the Linux kernel faster without hardware upgrades


    I thought only a faster CPUand SSDwould help but I already have a Quad-Core CPU and it wasn't being maxed out. The actual tests were performed on an AMD-V enabled 128MB dual core VMWare container though. There is a flag that can be passed to make in order to start multiple threads, by specifying 4 threads I was able to reduce the whole kernel compilation time from scratch by about 50%! (65minutes vs 31minutes!). *Yes I did do a make clean before each co........
  • Enable SPAMASSASSIN on Postfix in 5 minutes


    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........
  • MySQL NEVER delete ib_logfile0 or ibdata1 or you'll lose data


    don't delete /var/lib/mysql/ib_logfile0 or ibdata1 or mysql won't restart I didn't realize they were internal and not part of replication like the relay files! /usr/libexec/mysqld: ready for connections. Version: '4.1.22-log' socket: '/var/lib/mysql/mysql.sock' port: 3306 Source distribution 110127 16:31:00 [Note] /usr/libexec/mysqld: Normal shutdown 110127 16:31:00 InnoDB: Starting shutdown...........
  • CPU #1 not responding - cannot use it.


    I think this will be useful to others because I have a server that kept crashing mysteriously during intense disk usage/RAID checks. It would only crash during the weekly RAID integrity check. ThenI noticed during a reboot that not all CPUs were being brought up, as a result this actually creates much higher temperatures with the output I got from sensors, just booting the system produced higher than normal temperatures. You can imagine that a full blown RAID check........
  • Linux Realtek Gigabit NIC huge/high latency problem after sleep?


    That is pinging to the gateway IP on the same switch, the same IP is pingable externally without any problems which makes me think the switch is fine. 64 bytes from 55.55.55.55: icmp_seq=4 ttl=255 time=1.07 ms 64 bytes from 55.55.55.55: icmp_seq=1 ttl=255 time=3536 ms 64 bytes from 55.55.55.55: icmp_seq=2 ttl=255 time=2536 ms 64 bytes from 55.55.55.55: icmp_seq=3 ttl=255 time=1536 ms 64 bytes from 55.55.55.55: icmp_seq=8 ttl=255 time=1.20 ms 64 by........
  • mdadm won't boot due to fsck error


    Nov 29 20:17:58 ubuntu kernel: [ 1157.180789] md: md1 stopped. Nov 29 20:17:58 ubuntu kernel: [ 1157.180829] md0: unknown partition table filesystem not responding/reading properly with du or rsync (this needed an fsck). [ 2571.489217] EXT3-fs error (device md2): ext3_lookup: deleted inode referenced: 35923106 [ 2571.942299] EXT3-fs error (device md2): ext3_lookup: deleted inode referenced: 35923110 [ 2571.9568........
  • Geoip and Geocity Packages


    The "Geoip" package is available on virtually all Linux and Unix like systems and is very handy in looking an IP address' corresponding country. The homepage of the maintainers is here. They also have a package called "Geocity" which can be downloaded from their site, it is still free and gives you a close indication of the city the visitor is from. You can........
  • iPhone Enable Tethering Manually Update ipcc Carrier Settings/Update via SSH


    Everyone says there is a "manual" way of doing it and then they tell you to use iTunes, but if you're like me, you're travelling on business in a foreign country and your laptop does not have iTunes and you don't have a way of getting it and/or don't want it. For this example I'm using the provider "du" in Dubai, UAE (United Arab Emirates) but this method works for virtually all providers. The requirements in this case to truly "manually update........
  • [error] server reached MaxClients setting, consider raising the MaxClients setting - Apache


    Have you ever seen this dreaded message in your Apache/HTTPD /var/log/httpd/error_log? [error] server reached MaxClients setting, consider raising the MaxClients setting The error itself is slightly misleading. Ibelieve this happened to one of my servers, I found Apache was running still, and that you could telnet to port 80 but no respnose would be given. For some reason my error log initially did not have the above error, but after a restart I saw........
  • iPhone 3GS 32GB "Harsh Review"


    Yes, Iadmit I finally got bitten by the hype as much as I can usually see through it all. Keep in mind this review is of the "stock" phone, no jailbreaking yet which is what really unleashes the customizability and whyI bought iPhone. I had better things to say about this phone before buying it, and it is a great phone, perhaps the best on the market by far, if not because of the Mac OS port onto the iPhone and all the apps, etc, etc. With that said........
  • SSH Server Slow/Lagged/Delayed Login Response


    This is really something the SSHServer developers should consider. The cause of this annoyance is because of failed DNS lookups on your IPaddress, which is especially common for many dedicated/col-located servers and also computers on internal NAT/private networks. The chances are this is the cause of your SSHSlow/Delayed Login problems. The easy solution to SSH Login Problems Edit /etc/ssh/sshd_config Add this line to disable r........
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