Linux is one of the operating systems out there that is free no need to pay just download and install. For new technical people that want to use this piece of software (yes it's a software not a food) you can download ubuntu, or centos (my choice or even fedora) at Distrowatch.Com where before I check always for new distribution. Like microsoft it has many types example microsoft has windows xp, 2000, Me, 98 Vista, Windows 7 Linux has much more. Linux is like the DOS prompt then developers begin to create window managers for it so it looks like your average windows now. Very easy to install and use. Though you don't want to erase your 1 million dollar software pre installed in your alienware box you have the alternative to use virtualbox the free emulator (something like that in layman's term) you install this first and you can install linux inside the virtualbox like a window when you play windowed games like ragnarok, flyff perfect world and other games. 2 steps ...