Security Checklist/Where can you learn more about file permissions?
From Joomla! Documentation
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
Release Statement. Please feel free to make use of documents produced by myself in any format (electronic, hardcopy or public presentation) as required for the Joomla! project. All copyright is released to the Joomla! Project to re-use or publish the content of these posts under any license, as suits the projects needs.
Regards, Russ Winter