lynis

Lynis is a powerful command-line security auditing tool for Linux and UNIX-based operating systems. It is designed to assess system vulnerabilities, configuration errors, and potential issues that could compromise the security of the system.

With a lightweight and straightforward interface, Lynis can be easily used by both system administrators and security professionals. The tool scans the entire system for known security vulnerabilities and provides detailed recommendations to patch any identified weaknesses. It checks for system integrity, firewall settings, user authentication mechanisms, system logging, and much more.

Lynis conducts a variety of tests, including individual vulnerability scans, service and compliance audits, and system hardening recommendations. It compares system settings against industry-standard security practices, regulatory compliance requirements, and best practices.

The tool utilizes a plug-in architecture that allows users to extend and customize the program's functionality to suit their specific needs. It generates a comprehensive report that includes discovered vulnerabilities, suggestions for improving security, and additional information about the system's configuration.

Lynis is open-source, regularly updated, and actively maintained by its developers. It has gained popularity due to its reliability, ease of use, and versatility in auditing security on Linux and UNIX-based systems.