These steps apply to Ubuntu Linux only. If you are using some other flavor of Linux, get help from a TA.
You will need sudo access in order to complete these directions (The first user account has this by default).
Step 1: Install packaged software and libraries
Open a terminal (Applications > Accessories > Terminal). You may want to right-click on the terminal icon and select "Add to panel" so the icon will appear next to the default help and Firefox icons in the top panel.
Type this in the terminal:
sudo apt-get install git-core
If you get an error during apt-get resembling
Failed to fetch cdrom://Ubuntu...
it is because apt-get is trying to install packages from your Ubuntu install CD. If you don't have that CD on hand, you can try disabling it as a package source by following this Stack Overflow post: