20. Linux

• Variation on UNIX created by Linus Torvalds

• OS kernel and source code are freely distributed

• Popular distributions:

  • SuSE www.novell.com/linux/suse

  • RedHat www.redhat.com

  • TurboLinux www.turbolinux.com

• Used as both a server and a desktop

• X Windows: GUI shells for UNIX and Linux