This program is called "Metasploit" and is considered by many to be one of the most important hacking/pentesting tools around. It has an amazing array of exploits that can be used on many vulnerable machines, and when coupled with the vulnerability scanner Nessus (I'll cover this in the future) becomes a highly sophisticated tool we can use to hack into and secure our networks.
I'm installing this on Ubuntu Gnome Backtrack 5 (the newest release), so if you're on a different GUI (like KDE) and aren't using BT5, some things might be different.
NOTE: It may be useful for new users to check out my Linux commands overview that I recently updated (the day this post was released).
Hopefully you know the basics of Linux navigation and listing commands, so lets begin.