Linux

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Low Cost SAN

Low Cost SAN

The objective of this document is to provide making of Low Cost SAN using FOSS tools.

Squid - Delay Pools Bandwidth Management

Squid - Delay Pools Bandwidth Management

This feature is used to restrict the bandwidth usage for the user community. It has been introduced in ver 2.x.

Boot Linux Over HTTP With boot.kernel.org (BKO)

Boot Linux Over HTTP With boot.kernel.org (BKO)

This tutorial shows how you can boot Linux over HTTP with boot.kernel.org (BKO). All that users need is Internet connectivity and a small program (gpxe) to boot the machine. This gpxe program provides network booting facility. BKO allows you to boot into the following distributions: Debian, Ubuntu, Damn Small Linux, Knoppix, Fedora. BKO provides gpxe images for USB sticks, CDs, and also for floppies, i.e., you can boot from a USB sticks, a CD, or a floppy.

Easier Reinstalls

Easier Reinstalls

I typically reinstall my computer operating system every six months. The reasons for this are that it cleans out the system and reinstalls require me to be in front of the computer for a total of about ten minutes so it's painless. Notice I said "in front of the computer", the system does all of the work for me with some specially crafted bash scripts.

Secure Your Wordpress Blog Administration With Two-Factor Authentication

Secure Your Wordpress Blog Administration With Two-Factor Authentication

Wordpress is a very popular blogging service. It was recently hit by a disturbing vulnerability that allowed attackers to reset the Administrator's password. While there is a patch for that vulnerability now, wouldn't it be best to not use static passwords? It is actually quite simple to add two-factor authentication to Wordpress.

Finding Files On The Command Line

Finding Files On The Command Line

One of the things I like about Linux is the command line. I have used nautilus, gnome-commander, konqueror, kommander, dolphin and thunar to manage files in Linux and these file managers are great for what they do. But there are times when one simply wants to find a file when working on the command line without having to open a GUI application.

Configuring fail2ban With SquirrelMail On Debian Lenny 5.0/ISPConfig 3

Configuring fail2ban With SquirrelMail On Debian Lenny 5.0/ISPConfig 3

In this article I will show how to prevent brute force attacks with Fail2ban against your SquirrelMail Web login using the Squirrel Logger plugin.

How To Install Asterisk For Your First PBX Solution

How To Install Asterisk For Your First PBX Solution

Asterisk is one of the best telephony solutions which is free to use. There are others such as yate that provide same type of solutions and even more custom ones. Due to the easy of implementation Asterisk has become more popular than anything else. Asterisk is very easy to use and lots of open source and closed source panels provide a GUI for it.

Installation And Setup Guide For DRBD, OpenAIS, Pacemaker + Xen On OpenSUSE 11.1

Installation And Setup Guide For DRBD, OpenAIS, Pacemaker + Xen On OpenSUSE 11.1

The following will install and configure DRBD, OpenAIS, Pacemaker and Xen on OpenSUSE 11.1 to provide highly-available virtual machines. This setup does not utilize Xen's live migration capabilities. Instead, VMs will be started on the secondary node as soon as failure of the primary is detected. Xen virtual disk images are replicated between nodes using DRBD and all services on the cluster will be managed by OpenAIS and Pacemaker. The following setup utilizes DRBD 8.3.2 and Pacemaker 1.0.4. It is important to note that DRBD 8.3.2 has come a long way since previous versions in terms of compatibility with Pacemaker. In particular, a new DRBD OCF resource agent script and new DRBD-level resource fencing features. This configuration will not work with older releases of DRBD.

Registering Local Or Remote Commands With logsave

Registering Local Or Remote Commands With logsave

The general idea is to use the logsave to register commands and their outputs. Initially we record local commands and then we use this technique to make a record (locally) about a remote session.

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