The synaptics version of Nessus it is on version 2 (opensource), on official website of Nessus you can get the latest version.

  1. download Nessus and NessusClient depending of your distro and your processor arch
  2. reproduce the following steps
sudo dpkg -i Nessus-XXXXX.deb
sudo dpkg -i NessusClient-XXXXX.deb
  1. Get an activation code for update nessus plugins: register in nessus website at plugins section, click on request an activation code, then click on Register a HomeFeed, then go to your email
    /opt/nessus/bin/nessus-fetch --register XXXX-XXXX-XXXX-XXXX-XXXX
  1. adding an user, on Authentication (pass/cert) you can press enter ...
  1. starting nessus deamon (server)
    sudo /etc/init.d/nessusd start
  1. now its time to run nessus client (gui), also you can run from NessusClient shortcut (look for your desktop environment applications menu)