Lynis (server hardening audit)

Audits a Linux server's configuration and suggests hardening steps with a hardening index.

Official site: cisofy.com/lynis/
Licence: Free (GPL-3); enterprise version paid

With Odoo

Typical findings: SSH settings, unattended upgrades, file permissions on /etc/odoo, missing auditd.

The full room (install, configure, use, troubleshooting, management and a hands-on checklist) is in the academy.