If you're not disgusted by the thought of piping things in to or out of a cat...
You might be a Unix Geek.
If you commonly instruct people to ask "Your friend, Manuel"...
You might be a Unix Geek.
If naming software projects using a recursive acronym really trips your trigger...
You might be a Unix Geek.
Related: if you've ever laughed out loud at a joke which requires a thorough understanding and deep appreciation of the concept of recursion...
You might be a Unix Geek.
If you've long since forgotten that your coffee mug has vi commands on it...

You might be a Unix Geek.
If you maintain an SSH link to you parents' home network...
You might be a Unix Geek.
If you own a t-shirt that says "No, I won't fix your computer", but you can't find it anymore...
You might be a Unix Geek.
If you're judging me because the actual shirt says "No, I will not fix your computer" and you know that for a fact because you're wearing it right now...
You might be a Unix Geek and a pedant. ;)
If your preferred Twitter client has a command line interface...
You might be a Unix Geek.
If you have to constantly remind yourself that RTFM is not a socially acceptable answer...

You might be a Unix Geek.
If you've ever lectured somebody on the virtues of considering everything as a file...
You might be a Unix Geek.
If the phrase "less is more" invokes your thoughts on the pros and cons of different text pagers...
You might be a Unix Geek.
If you can enumerate the differences between OpenBSD, FreeBSD, and NetBSD...
You might be a Unix Geek.
If "tar czvf" makes any sense to you at all...
You might be a Unix Geek.
If you've ever made one of your friends telnet to towel.blinkenlights.nl...
You might be a Unix Geek.
If you have "emacs rules" tattooed across your fingers...
You might be a Unix Geek. And a mutant.
If you have a server in your employ with more than 3 years of uptime...
You might be a Unix Geek.
If your notes, to-dos, grocery list, essays, and email are all stored as plain text...
You might be a Unix Geek.
And finally...
If while reading this you felt compelled to point out that most of these jokes don't relate directly to Unix, but instead to 'Unix-like' derivatives such as Linux and associated software such as the suite of Gnu utilities which, for my information, are expressly NOT Unix even in their very name...
Congratulations, you're a HUGE Unix Geek! ;)
Surely I'm neither the funniest nor the biggest Unix Geek in the room. Please, add your own in the comments or tweet them to me and I'll post them here!