Jason,

How about, "a computer geek wouldn't get the joke?" for a punchline?

I got this from Fred Langa's LangaList. Apologies to those who already subscribe...

Set to a classic Monty Python tune, "I'm a lumberjack ".

I never really wanted to be a scientist.
I wanted to be...a...A SYSADMIN!

[system engineer choir and shift supervisor enter, music strikes up]

Oh, I'm a sysadmin and I'm OK,
I grep all night and I chown all day.

[choir] He's a sysadmin and he's OK, He greps all night and he
chowns all day.

I ping the nodes, I do PM, I awk and perl and sed.
I've got a Star Wars lunchbox, and Tron sheets on my bed!

[choir] He pings the nodes, he does PM, he awks and perls and
seds.
He's got a Star Wars lunchbox, and Tron sheets on his bed!
[repeat chorus]

I ping the nodes, I change the rates,
I fork the processes. I wish that all my lusers would catch some
rare disease!

[choir, growing slightly uncomfortable] He pings the nodes, he
changes rates, He forks the processes. He wishes all his lusers
would catch some rare disease! [choir brightens as they repeat
chorus]

I ping the nodes, I lock the /home partition and umounts.
I post .gifs of my boss's daughter from his own account!

[choir, very uncomfortable and trailing off]
He pings the nodes, he locks the /home partition and
umounts...??