How to install Nessus on Backtrack 4

Things has not changed much in the previous versions, of both BackTrack (except it's now Ubuntu) and Nessus. However, it is always good to post something here so that I can refer back to it when I need to.

What you will need is to Download Nessus via:
http://www.nessus.org/download/

The version I get now is 4.2.2. You probably want the GUI as well, which I am not very sure if it is still supported since the version is still at 4.0.2:
http://www.nessus.org/download/index.php?product=NessusClient

In your BackTrack, open a command prompt (or shell) and run:
dpkg -i
for both the Server and the Client (if you want the GUI).

For Nessus Server, the following steps are required:

1. 1. Make the certificates
   
   

   /opt/nessus/sbin/nessus-mkcert

2. Register the scanner in order to download update
   

   /opt/nessus/bin/nessus-fetch –register XXXX-XXXX-XXXX-XXXX-XXXX

   Nessus will fetch the update once it finish register. Btw, I presumed you know how this works, if not, you can refer to: http://www.nessus.org/register/

3. Create a Nessus User
   

   
   /opt/nessus/sbin/nessus-adduser
   
   

4. Start Nessus Server
   

   
   /etc/init.d/nessusd start
   
   

5. Start Nessus Client
   
   

   Backtrack -> Internet -> NessusClient or from CLI: /opt/nessus/bin/NessusClient

That's all to it.