Install the latest version of the Metasploit 4 Framework (MSF4) on Ubuntu 11.04 Natty Narwhal using the following commands. This downloads and installs the generic Linux binary which comes bundled with all the necessary components you need for Metasploit to install and run. This should work for most users and is the easiest way to get Metasploit Framework running under Ubuntu and other Debian based Linux distros quickly.

In a Terminal type the following

 wget http://updates.metasploit.com/data/releases/framework-4.0.0-linux-full.run

If you’re installing on a 64bit build of Ubuntu, use this instead

http://updates.metasploit.com/data/releases/framework-4.0.0-linux-x64-full.run

This downloads the current version of the Metasploit framework via wget.

Before you can run the installer you need to make it executable.

chmod +x framework-4.*-linux-full.run

And now execute the installer.

sudo ./framework-4.*-linux-full.run

Assuming all went well MSF 4 should now be installed. You should update it before running it.

sudo msfupdate

Now run it.

msfconsole