For checking the overall health and security of your Joomla-based website you can use a free extension called Joomla! Tools Suite. It can be downloaded at:

http://joomlacode.org/gf/project/jts/

For more detailed information about how to install the component, please refer to our Joomla tutorial.

With this component you can perform an environment audit of your Joomla, diagnose, report and advise on common installation, health and security issues, including performing several common performance and recovery actions.