How to install nessus on Backtrack 5

After Website Information Gathering, the second task is explain How to install Nessus on Backtrack. 
Okey, for your informastion Nessus is a proprietary comprehensive vulnerability scanning program. It is free of charge for personal use in a non-enterprise environment. Its goal is to detect potential vulnerabilities on the tested systems.

Oke, let's try to install Nessus..

1. Download the installation packet from the official page at www.nessus.org. But you can also just type the command below to your terminal if you already are connected to the Internet.

root@bt:~# apt-get install nessus