System Hardening
Major release: Lynis 3.x
Learn about the most important changes that form the major 3.x release of the Lynis project, including security enhancements and new tests.
How to secure a Linux system
Looking to secure your Linux system? This security guide shows you how to perform system hardening and run technical audits to keep it in optimal condition.
Ubuntu system hardening guide for desktops and servers
Step by step guide to secure any Ubuntu desktop or server. Harden your Ubuntu during installation and afterwards with the available security tips.
Linux security guide: the extended version
Feeling overwhelmed with the options available to secure your Linux system? With this guide, we walk step-by-step through the option, tools, and resources.
Linux system hardening: adding hidepid to /proc mount point
The pseudo-filesystem /proc contains a lot of useful information for the system administrator. With the hidepid option we can restrict what users can see.
How much system hardening should you do?
System hardening is the process of improving security defenses of desktop and servers. It is usually time-consuming, so let's decide when enough is enough.
Linux hardening with sysctl settings
The Linux kernel can be secured with the help of kernel tunables called sysctl keys. Learn how system hardening principles can be applied using sysctl.
Linux Security Guide for Hardening IPv6
Extensive guide to help you secure your IPv6 configuration on Linux. From initial set-up to hardening the kernel with sysctl.
Tiger is History, Long Live Modern Alternatives!
The tiger tool was known for a long time to help with auditing Unix-based systems. Fortunately there are new tools that are better maintained.
Security Defenses to Fortify your Linux Systems
Your Linux systems should be protected against common security attacks. By using 4 common techniques, we can fortify our systems like a real fortress.
Audit SSH configurations: HashKnownHosts option
Information about the HashKnownHosts option in the SSH configuration file. Explains how to audit and tune this option to secure an Unix based system.
Linux server hardening and best practices
One of the myths is that Linux systems are secure by default. Learn what kind of measures you can implement and which security tools help with that.
Linux kernel security and how to improve it
Every system is as strong as its weakest link, especially the system kernel. This article explains Linux kernel security, what we can do and how to do so.