Lynis Security Controls

AUTH-9228 - Linux password file consistency


Password files like /etc/passwd and /etc/shadow should be checked on a regular basis to see if any errors are present.



How to solve

Run pwck and grpck to check password and group files. Any issues found can be solved by running vipw and vigr.

Additional resources

  • Lynis (Lynis project page)

Perform daily health checks of your environment, learn in-depth system hardening, and protect your systems better.

Upgrade to Lynis Enterprise

Linux and Unix System Hardening

This information is provided as part of the Lynis community project. It is related to Lynis control AUTH-9228. All information should be considered as-is, without guarantees. Any advice or snippets should be tested before implementing in production environments.


Lynis is a technical security audit tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. The project has an active community, including open development via GitHub.

Lynis Enterprise

Need more advanced features, like vulnerability scanning, or reporting installed software packages? Lynis Enterprise will collect more data and present it with an easy to use web interface.

Gain additional benefits: automating security audits, reporting, and the implementation of related security measures.

Lynis Enterprise includes
  • Centralized management
  • Prioritized plans
  • Reporting
  • Dashboards
  • Integration (API)
  • Improvement snippets for tools like Ansible, Chef, Cfengine, Puppet, and SaltStack

Take the Tour