Lynis
Lynis is an auditing tool for Unix. It scans the system and available software, to detect security issues. Beside security related information it will also scan for general system information, installed packages and configuration mistakes. Visit the
HomePage for more info. Note the window will take a minute or so to display the results.
As with any auditing system the results of this test are only meant as a guideline, so take all results with a grain of salt and if in doubt contact your provider or an expert.