To download Nessus, we can navigate to its Download Page to download the correct Nessus binary for our system.
Next, we can visit the Activation Code Page to request a Nessus Activation Code, which is necessary to get the free version of Nessus:


With both the binary and activation code in hand, we can now install the Nessus package:
dpkg -i Nessus-8.15.1-ubuntu910_amd64.deb
Once we have Nessus installed, we can start the Nessus Service:
sudo systemctl start nessusd.service
To access Nessus, we can navigate to https://localhost:8834. Once we arrive at the setup page, we should select Nessus Essentials for the free version, and then we can enter our activation code:
