I use
top to discover which processes, rogue or otherwise, are running and then
kill to stop any ones which I don't want (e.g. HP Communications as soon as I login I delete it. There's no way to get rid of it from startup because everytime I print something it replaces itself AND it takes up like 80% CPU!).
I also use
ftp a lot. It's one of the best ftp clients really, it lets you do anything and its free!
uptime so i can brag to people how long my computer has been up. (Currently at a measly 6 days).
Then
ssh. Now to a newbie this takes a little explaining. But basically if you have ssh running on another mac/computer (Turn it on in System Preferences -> Sharing) then you can control that computer from another. Eg. ssh -l rlobue 192.168.0.2 will log me onto my G5 from my iBook. This way I don't have to get up (Cos I'm lazy) to
open iTunes.app and share my PowerMac's music with my iBook. Also, I can access through the internet, so I scare my mum when I'm away by playing iTunes on max volume
(yep! i'm a bast*rd)!
And then my favourite (copied from MacOS Hints): Type in
emacs and press Enter. Once it's loaded, press and release Escape, and then type x. At the bottom of the screen, you'll see M-x; type
tetris and press Enter.
You're now playing Tetris within emacs. Use the arrow keys and space bar (to drop blocks) to play. When you are done, a highscore will be generated at /tmp. You can then exit emacs by pressing Control-X followed by Control-C.
So! What else? Hmm... I'll come back when I remember (when I use them basically!)