The common name for any open-source Operating System running on the Unix Kernal.
Common linux distributions include Ubuntu, Redhat, SUSE and Fedora.
The advantages of Linux over Windows:
-faster boot/loading times.
-no need for anti-virus software
-no bloatware, spyware or useless programs to slow your computer down.
The disadvantages of Linux over Windows:
-game makers and large software companies stick with Windows because of its market share.
-less users than windows (which is also advantageous in a way) means less people working on making it even better.
-often not user friendly (although Ubuntu is considered to be the most user-friendly version, and is very easy to get used to).
I just installed Linux on my laptop. So glad I'm rid of Windows Vista.