Trending September 2023 # How To Audit Your Linux Security With Lynis # Suggested October 2023 # Top 18 Popular |

Trending September 2023 # How To Audit Your Linux Security With Lynis # Suggested October 2023 # Top 18 Popular

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For most home-based situations, you won’t have to bother with the security of your Linux machine. It is pretty secure by default. However, if you are using your computer as a server, either SSH server or Web server, or you are the system administrator for your company, then you will have to step up on the Linux security.

Lynis is an auditing tool which tests and gathers (security) information from Unix-based systems. The good thing is that it is easy to use, and you can get a security report on your Linux Security in as fast as five minutes. If you are a security and system auditor, network specialist or system maintainer, this is a tool you will want to have in your arsenal.

In Ubuntu, you can easily install Lynis via the Ubuntu Software Center or from the following link. If you are managing a remote system, you can install with the command line:


apt-get install


For other distros, you can check out the Lynis homepage where there are links to non-official RPMs and Debian packages for various distros.


The usage of Lynis is very simple. In the terminal, you just have to type the command:




and it will check the system for security issues. The things it checks will include:

System tools

Boot loaders, startup services

Kernel: run level, loaded modules, kernel configuration, core dumps

Memory and processes: zombie processes, IO waiting processes

Users, groups and authentication: group IDs, sudoers, PAM configuration, password aging, default mask

File systems: mount points, /tmp files, root file system

Storage: usb-storage, firewire ohci

NFS Software: name services: DNS search domain, BIND

Ports and packages: vulnerable/upgradable packages, security repository

Software: firewalls: iptables, pf

Software: webserver: Apache, nginx

SSH support: SSH configuration

SNMP support Databases: MySQL root password LDAP services

Software: php: php options

Scheduled tasks: crontab/cronjob, atd

Time and synchronization: ntp daemon

Cryptography: SSL certificate expiration

Security frameworks: AppArmor, SELinux, grsecurity status

Software: file integrity

Software: malware scanners

Home directories: shell history files

and more

Once it has finished scanning, it will generate a report and save it to chúng tôi Open it up in your terminal:









You can scroll down the list to read all the tests that Lynis has performed. Alternatively, you can just search (using the shortcut key Ctrl + w) for “Warning” to find the entries that need your attention.

Better still, you can use the following command to list all the “Warnings” in the report:











to get a list of “Suggestions” provided by Lynis.

That’s it.

Even if you are an experienced Linux administrator, there are bound to be certain security loopholes that you have missed in your Linux security. With Lynis, you will be able to audit your system and make sure the all security features are enforced.

Image credit: Up, Tight


Damien Oh started writing tech articles since 2007 and has over 10 years of experience in the tech industry. He is proficient in Windows, Linux, Mac, Android and iOS, and worked as a part time WordPress Developer. He is currently the owner and Editor-in-Chief of Make Tech Easier.

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