CodySnider.com

First, enable the universe and multiverse repositories in your source list. This will ensure you have access to this software.

Now, let's add some packages. One is the client (nessus), one is the host(nessusd):

sudo apt-get install nessus
sudo apt-get install nessusd

After those install, we need to create a login on the host for the client:

sudo nessus-adduser

Now, let's add a link and start the host service:

sudo ln -fs /etc/init.d/nessusd /etc/rc2.d/S20nessusd
sudo /etc/init.d/nessusd start

Let's add an icon/launcher to the application menu:

sudo gedit /usr/share/applications/Nessus.desktop

When that window opens, put this information into it and save:

[Desktop Entry]
Name=Nessus
Comment=Nessus
Exec=nessus
Icon=/usr/share/pixmaps/nessus.xpm
Terminal=false
Type=Application
Categories=Application;System;

In your applications menu under the 'system tools' submenu you will find your program. Have fun. :-)