Some Security Features
Linux Malware detect: https://www.rfxn.com/projects/linux-malware-detect/ and https://kb.iweb.com/hc/en-us/articles/230267588-Scanning-for-malware-with-Linux-Malware-Detect-LMD-
RKHunter Scan – http://rkhunter.sourceforge.net/ and https://en.wikipedia.org/wiki/Rkhunter
Lynis Scan – https://cisofy.com/lynis/