LinuxUnix

Unix monitoring and audit

https://cisofy.com/lynis/

Lynis is an open source security auditing tool. Used by system administrators, security professionals, and auditors, to evaluate the security defenses of their Linux and Unix-based systems. It runs on the host itself, so it performs more extensive security scans than vulnerability scanners. It is also the client in our Lynis Enterprise offering.

https://www.tecmint.com/linux-server-health-monitoring-script/