System/security auditing tool for hardening and securing Linux/Unix

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Lynis is a system and security auditing tool for Unix/Linux. Main audience of this tool is security consultants, auditors and system administrators.

This tool performs a security audit of the system and determines how well it is hardened. Any detected security issues will be provided in the form of a suggestion or warning at the end of the audit. Beside security related information it will also scan for general system information, installed packages and possible configuration errors.

This software aims in assisting automated auditing, hardening, software patch management, vulnerability and malware scanning of Unix/Linux based systems. It can be run without prior installation, so inclusion on read only storage is possible (USB stick, cd/dvd).

Lynis assists auditors in performing Basel II, GLBA, HIPAA, PCI DSS and SOx (Sarbanes-Oxley) compliance audits, by automation of control testing.

Extended support for companies is available.

Lynis Web Site


  • System auditing
  • Hardening suggestions
  • Security scan
  • Vulnerability scan


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