Lynis
Lynis is a system hardening and compliance testing tool that performs comprehensive system health scans. Aside from IT security professionals, developers use Lynis to improve web application security, while sysadmins utilize it to discover new weaknesses.
Lynis uses an opportunistic and modular approach to scanning, meaning it can scan for available system tools and then perform a tailor-made system test. This approach allows Lynis to require no dependencies to run.
Features
Over 300 built-in tests.
Plugin and custom test support.
Dynamic operating system detection.
Detailed logging.
Hardening index.
Pricing
Lynis is a free-of-charge and open-source application. There are also two SaaS offers for Lynis:
The Premium includes all the modules and a monthly subscription.
The Self-Hosted option allows users to customize the offer to meet their needs.

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Lynis is an open-source system hardening and compliance testing tool that performs comprehensive health scans with over 300 built-in tests. It uses a modular, opportunistic scanning approach that requires no dependencies, automatically detecting available system tools to perform tailored tests. The tool provides detailed logging, a hardening index, and supports plugins and custom tests, making it valuable for security professionals, developers improving application security, and sysadmins identifying system weaknesses.

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