Mastering Linux Security and Hardening

Installing Lynis on Ubuntu

Ubuntu has Lynis in its own repository, but which version you get depends on which version of Ubuntu you have. The Ubuntu 16.04 LTS repository has a version that's fairly far behind what's current. The version in the Ubuntu 17.10 repository is newer, but still not completely up to date. In either case, the command to install Lynis is:

sudo apt install lynis

If you want the newest version for Ubuntu or if you want to use Lynis on operating systems that don't have it in their repositories, you can download it from the author's website. 

You can download Lynis from https://cisofy.com/downloads/lynis/.The cool thing about this is that once you download it, you can use it on any Linux, Unix, or Unix-like operating system.  ...