HEY. Where's the Linux tutorial?
Nevermind, it's simple enough.
If you're running Ubuntu 8.04 Hardy Heron, open up Terminal and input the command
Code:
sudo apt-get install skype
It will ask you for your password, which you will type in. Then voila, skype is on your 'Nix system!
Here's a pic of what to do.
If you don't run Ubuntu, well, sorry. I don't have a tutorial for you.