You know you're a geek when........

[bonzodog]

hehe...thanks people, I've really got this one going, so another one...

When you consider inviting the computer to your wedding as a guest...

[poofyhairguy]

you enjoy customising your distros and reading news about Linux more than playing xbox/Ps2 games.

you can't resist five minutes without thinking and/or talking about Linux (or using it)

Guilty as charged for me.

Another:

The case of your computer stays open.

[Collin]

when you use the college printers to print a collection of o'reilly books saying that it is for a really long homework.

When you can troubleshoot a computer by the noise it's doing.

You know something is wrong when your harddrive is writing when it shouldn't

You never used any antivirus, anti spyware or firewall with a windows system and got away for years without any problems.

When you get girls by showing them how cool a terminal can be.

[xequence]

You know something is wrong when your harddrive is writing when it shouldn't

Wow, thats cool, I can do that =D

It sometimes goes crazy on the hard drive so I kick it and it stops. Same with CD drive, though for it I have to hit the top with my hand or the top of the side.

[Omnios]

You know your a geek when you get up in the morning and check this forum instead of reading the daily local.

[matthew]

...it's Friday night at 8 p.m. and you are online responding to a "You know you're a geek when..." thread.

[doclivingston]

You start a conversation with someone by saying "HELO your.name" and they reply "250 their.name"

You know the saying as "cd /pub; more beer"

[zenrox]

read sig nuf said

[valczir]

You accidentally convinced the librarians at your school that they should have a linux box for people to learn linux on.

The thing you're looking forward to most is getting your official ubuntu CD(s)

Your room is completely spotless, except for an unmade bed. Oh, and you have paper piled inches or feet high around your monitor, computer, and general desk area.

I forgot: The school at which you are a student is having you make a custom <insert_video_game_title> module of the school to help freshmen learn how to get around easier, and you're doing it for free because you think it's fun.

[Takis]

Although this has been mentioned in a similar way, I actually did this one:
You're reading the latest Harry Potter, and he's trying to find out what horcruxes are, and you think "Why doesn't he just Google it?".

There's more dust in a biochemistry lab than in your computer.

You ask your friends questions using the LISP convention (appending a 'P', designating a predicate):
Q: “Foodp?”
A: “Yeah, I'm pretty hungry.” or “T!”