use git on ubuntu

I installed git today. I had thought what git is like blog that I paste code easily until it installed. But it is different, I have to need configuration before using it. Most difficult thing was this

Generating SSH keys (Linux)
http://help.github.com/linux-key-setup/

I use ubuntu usually. To use git on linux need this. It was hard for me because I have never generated it. git is hard to use until!