If you are running Debian or Ubuntu, run the following command:
sudo apt-get install git-core
That will install the git version control system. If you get an error, let a staff member know.
Set your user name and email
You'll also want to tell git your name and email address. To do this, type:
git config --global user.name "your-user-name" git config --global user.email "your email"
You can test that they've successfully been set by typing:
git config --global user.name git config --global user.email
Sign up for a Github account
You can do so at this link.