Free Software Magazine has a great article on Knoppix for those looking to learn a bit about Linux.
Getting started with Knoppix Linux doesn’t have to be costly. Chances are you already have everything you need. The requirements are simple. Any computer newer than 5 years old with a working bootable CD or DVD drive should be able to run Knoppix.
I would like to install a Linux operating system on my 5 year old PC. Prior to this, I’d like to know
more about how Linux works, how it installs, and what is necessary to run Linux after such an installation.
I guess, Knoppix would be a good starting point.
If the machine is too old to run Knoppix, check out the 50 MB Damn Small Linux. Or, if you just want a smooth desktop environment, the upcoming 6.06 releases Ubuntu, Kubuntu, and Xubuntu are looking really nice. I would recommend the new Ubuntu 6.06 Desktop CD plus installer over the Knoppix installer.