Lynis - Security auditing tool for systems running Linux, macOS, BSD, and other UNIX-based systems.
Ossec - OSSEC is an Open Source Host-based Intrusion Detection System.
Silverback - Silverback 3
Samhain - The Samhain host-based intrusion detection system (HIDS) provides file integrity checking and log...
Chkrootkit - Chkrootkit is a Linux tool to locally check for signs of a rootkit. It contains:
Tripwire - Open Source Tripwire software is a security and data integrity tool useful for monitoring and...