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I was curious about how I would be able to run multiple web servers and have traffic routed to different servers in my network. I figured that it would involve vhosts and some manner of proxy but in the link below there is a detailed write up on how you can configure your network so that you can run as many web servers as you want.

Reverse Proxy with Squid – RSWiki.

I work a lot using SSH. My day to day work sees me logging in to about 5 different boxes using ssh. There are a couple of commands listed at the site below that makes using ssh a little bit easier.

Beginning SSH on Ubuntu | Principia Labs.

I just came across this post. I feel that it raises some very important issues regarding users and Linux. Take a read …

Linux isn’t invulnerable. Don’t say it is..

Because I use Virtual Machines quite regularly and install and uninstall different Linux OS’s I have been blighted by the fact that a new server may get the same IP address as an uninstalled server. As a result when I try to SSH into the box I’m warned that the SSH Key has changed and it will no longer let me log in.

I then have to remove the offending key from my ~/.ssh/known_hosts file.

Very often though (if you use ssh a lot) this file will have numerous keys in it.

If you need to remove an offending ssh key type the command below into your terminal (don’t forget to change the number 6 below to your corresponding key)

perl -pi -e ‘s/\Q$_// if ($. == 6);’ ~/.ssh/known_hosts

I’ve been mulling over the idea of setting up my own personal PBX server at home and I’ve been looking into Asterisk. For a while it has been eluding me as to how I could get it going but last night I had a Eureka moment and everything just made sense.

I’ve been trying to set it up on a virtual machine first so I could get used to using it and also to become familiar with it’s features.

I usually use Ubuntu so initially I tried to set Asterisk up using it however it seems as though CentOS is a more stable platform for Asterisk so I followed the instructions in the post below. Now I just have to get to grips with the multitude of features that it provides.

via projectb14ck | Transparent Telephony Part 2, Installing Asterisk.

There seem to be a lot of noise in tech circles regarding deduplication in data storage. Basically, for those of you that don’t know, deduplication has been described as “single instance storage” or “intelligent storage”.

Deduplication will not copy the same file over and over but instead will copy one instance of the file and then link any other instances of it to the stored copy.

It may not sound like much but with the worlds thirst for knowledge and also needing a place to store and back it up all takes up space. Any technology that helps maximise storage potentials is generally welcomed with open arms.

Generally when new technologies emerge that save companies money they generally are expensive commercials options. I decided to scout around and see what the Open Source community had to offer in the field of deduplication.

• Backup PC
• LessFS
• An article regarding BackupPC in a virtual setup

Taken from: Deduplication – Ubuntu Forums.

I have thousands of mp3 files and I wanted to rename them all so that they all have the same basic format. When I was trying to do this in Windows I found that it took an huge amount of effort and often it didn’t reproduce the results that I was looking for (perhaps I didn’t try hard enough, who knows). The article linked below shows a number of great ways to rename a file using the command line. Hopefully it will be of some use to someone out there.

Shell stuff: rename multiple files on the command line – Basically Tech.

I have a couple of Linux servers running at home and I love it when I come across projects like Elgg. Like Joomla, Status or Drupal Elgg is an Open Source Framework which you can use to start up your own social community. I haven’t got my teeth into it yet but I’m looking forward to installing it at home and getting my teeth well and truely sunk in to it. I’ll post more when I’ve evaluated it properly.

Elgg – Open Source Social Networking Engine..

I use this blog as a way to bookmark sites that I think I will need to do my job. I came across this site while fluting about the internet. Perhaps it may be of some use to you too.

8 free software to image/backup/ghost your computer free alternatives to Acronis True Image, Norton Ghost, etc.. | Featured | dotTech.

Now that I’m planning on sitting the LPI exams site like the one linked below will come in really handy I think!

Free On-line Linux Technical Books and Tutorials.