security auditing tool for Unix based systems

 Lynis is an auditing tool for hardening GNU/Linux and Unix based systems.
 It scans the system configuration and creates an overview of system information
 and security issues usable by professional auditors.
 It can assist in automated audits.
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 Lynis can be used in addition to other software, like security
 scanners, system benchmarking and fine-tuning tools.