🔹System Audit

Lynis

Lynis - Security Tool for Audit and Hardening Linux Systems - GeeksforGeeksGeeksforGeeks

OpenSCAP

GitHub - OpenSCAP/openscap: NIST Certified SCAP 1.2 toolkitGitHub

Otseca

GitHub - trimstray/otseca: Open source security auditing tool to search and dump system configuration. It allows you to generate reports in HTML or RAW-HTML formats.GitHub

RKHunter

How To Use RKHunter to Guard Against Rootkits on an Ubuntu VPS | DigitalOceanDigitalOcean

15+ Rkhunter usages with example - Unix/LinuxCrybit.com

ClameAV & Maldet

An Introduction to Maldet and ClamAV Malware ScanningGridPane