title: config chmod setting in mybb and joomla
body: <p>my question is why the my bulletin board config file must have permission 666 and do not need execute permission but joomla config file need it and must have permission 777
  and here you see the recommended permission</p>
  
  <pre><code>Required – ./inc/settings.php – 666
  Required – ./inc/config.php – 666 (install) 444 (after installation)
  Required – ./cache/ – 777
  Required – ./cache/themes/ – 777
  Required – ./uploads/ – 777
  Required – ./uploads/avatars/ – 777
  Optional – ./admin/backups/ – 777
  Optional – ./inc/languages/*language*/*all files*/ – 666
  Optional – ./inc/languages/*language*/admin/*all files*/ – 666
  </code></pre>
  
  <p>can any one explain why permission 666 and not 644
  or why permission 777?that is not a security risk
  and another question is what is group exactly?</p>