battlestar galactica finale grumbling.

( spoilers back here )

seeking help making young geeks geekier

one of my cousins has a kid (i think middle-school age) who wants to be a big computer geek. she's apparently pretty clever and likes messing around with her family's computer and stuff. i'd love to set her loose on my linux server and let her mess around with programming and stuff. suggestions for good online resources for learning unix starting from a position of beginner's mind? i may have a copy of the o'reilly "learning the unix operating system" kicking around somewhere, but can anyone suggest a good online tutorial they're fond of?

i'd prefer something that's not specifically written for students of some particular school, so there's not a lot of "well, as the office of money affairs if you need access to the banana server. they're in bigtree hall." sort of stuff.