UNIX, LINUX, RED HAT What it all about

Im new the the whole Unix OS. I would like a breif description of the whole concept. I have heard it is open source so anyone can get the source code? Is this correct. Also is linux, Unix, Redhat all the same program just different versions.

Also I have a 486 200 MHZ computer I was considering installing Unix On Anything I should know before I venture off into this adverture.

Im excited about the concept just need a little claification.

Thanks

Sean

Please read the FAQs on this site, and search around here... This gets covered at least once a week...

One thing that doesn't get covered is what kind of machine you need - you can install a working copy of Linux on anything down to a 286, but don't expect great results... If you want the typical desktop setup (a GUI, sound, etc...) I'd say upgrade...