Linjutsu

A mastery of the Linux operating system comparable to the martial art of ninjutsu, acquired by a similar single-minded dedication to years of practice. Geeks with a superior mastery of Linux are Linjas (a variation of the word ninja). Someone with an exceptional mastery of the Command Line Interface is a CLInja (often the same thing, as most of Linux' magic is done through the CLI).

"My Linux laptop kept crashing, but then Greg practiced his Linjutsu on it, and now it works perfectly."
"Yeah, Greg is a real Linja."