[Httpd Wiki] Update of "13PermissionDenied" by megaspaz

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The following page has been changed by megaspaz:
http://wiki.apache.org/httpd/13PermissionDenied

The comment on the change is:
added more specificity to directory permissions.

------------------------------------------------------------------------------
  
  GNU based systems often have a {{{namei}}} program that helps in viewing the permissions of a complete path.
  
+ Note that the permissions used below for examples assumes that the Apache user is not
+ the owner or group owner of any of the resources. It is also assumed that you, the user/admin, knows and understands the unix permissions/ownership scheme.
+ 
  Make sure that the file to which permission was denied is at least readable by the Apache user (eg {{{-r--r--r--}}} or 444 as a minimum. {{{-rw-r--r--}}} or 644 is more usual). 
  
- Directories and scripts also need to be 'executable' ({{{dr-xr-xr-x}}} or 555. {{{drwxr-xr-x}}} or 755 is more common). This includes '''all''' parent directories of a resource too!
+ The '''!DocumentRoot''' directory and its subdirectories need to have the 'read' and 'executable' bits set ({{{drwxr-x-r-x}}} or 755 is most common).
+ 
+ Parent directories up to the '''!DocumentRoot''' directory need at least the 'executable' bit set ({{{drwx--x--x}}} or 711 for example).
+ 
+ These above also pertain to '''Userdir''' (a.k.a. '''public_html''') where you can think of a user's '''public_html''' directory as the '''!DocumentRoot''' for that user.
+ 
+ Scripts to be executed need to be 'readable' and 'executable' ({{{drwxr-xr-x}}} or 755 being most common).
  
  
  On Linux, you can use the {{{namei}}} command to return permissions of everything in the path to the target file or directory.