How To Install Lynis on Ubuntu 20.04 LTS

Install Lynis on Ubuntu 20.04

In this tutorial, we will show you how to install Lynis on Ubuntu 20.04 LTS. For those of you who didn’t know, Lynis is the popular security auditing tool for Linux, Unix, and macOS systems. The aim of leveraging an auditing tool such as Lynis is to probe and resolve any underlying security vulnerabilities, and configuration errors such as weak user account passwords or inappropriate file permissions that might compromise the system in face of an attack. Lynis was commonly used by system administrators and auditors to assess the security defenses of their systems.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of the Lynis security auditing tool on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian-based distribution like Linux Mint.


  • A server running one of the following operating systems: Ubuntu 20.04, 18.04, 16.04, and any other Debian-based distribution like Linux Mint.
  • It’s recommended that you use a fresh OS install to prevent any potential issues
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Lynis on Ubuntu 20.04 LTS Focal Fossa

Step 1. First, make sure that all your system packages are up-to-date by running the following apt commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing Lynis on Ubuntu 20.04.

By default, the Lynis package is not available on Ubuntu 20.04 base repository. Now we add the Lynis repository to your system using the following command:

echo "deb stable main" | sudo tee /etc/apt/sources.list.d/cisofy-lynis.list

Next, download the signing key:

wget -O - | sudo apt-key add -

Then, use the following commands to install Lynis:

sudo apt update
sudo apt install Lynis

Check the version of installed Lynis:

lynis show version


Version            : 3.0.6
Status             : Up-to-date
Release date       : 2021-10-20
Project page       :
Source code        :
Latest package     :

Step 3. Auditing a Linux System Using Lynis.

To perform a basic security audit of your system, run the command:

sudo lynis audit system

Install Lynis on Ubuntu 20.04 LTS Focal Fossa

To display other commands that you can run using Lynis, execute:

lynis show commands


lynis audit
lynis configure
lynis generate
lynis show
lynis update
lynis upload-only

Congratulations! You have successfully installed Lynis. Thanks for using this tutorial for installing the Lynis security auditing and hardening tool on Ubuntu 20.04 LTS Focal Fossa system. For additional help or useful information, we recommend you check the official Lynis website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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