If you haven't quite gotten it yet, here are a few posts that helped me out a lot.
- for Android 2.1
Join the IRC
for Unrevoked 3.2 if you're on Froyo.
Getting Unrevoked to run: Linux + UnrEVOked3
And as far as running ADB (shouldn't need this immediately or for Unrevoked, but it is needed for other things):
Open a terminal in sdk/tools and type "./adb devices" (no quotes) to see if it finds your phone.
If you get the "No Permissions," go to ADB: "no permissions" (Linux Mint 9) [SOLVED]
and check out where the OP writes /SOLVED
Edit: oh, and to get out of sudo, just type "exit" (without quotes) if I recall correctly.