The final step on your administrator's list involves running an audit against the system in order to harden it. You'll use the system and security auditing tool Lynis to do so.

Install the Lynis package to your system if it is not already installed.

Check the Lynis documentation for instructions on how to run a system audit.

Run a Lynis system audit with sudo.

Provide a report from the Lynis output with recommendations for how to harden the system