A fan of the Linux operating system stereotyped to be a geek because of the need to memorise hundreds if not thousands of commands to actually use the computer.
They are usually very defensive of their operating system and hate Windows users and Mac addicts alike.
Windows user: I'm just going to play Rome:Total War now
Mac user: I think I'll edit some photos or create a movie perhaps
Linux geek: I can't play games or edit photos. I'll entertain myself memorising some cryptic commands - that will help me succeed in life