Merge lp:~evarlast/serverguide/explain-perms-httpd into lp:serverguide/trunk

[Jay R. Wren]

Explain the permissions in the find and chmod commands at the end of the apache web server section.

[Doug Smythies (dsmythies)]

O.K. Thanks.

review: Approve

=== modified file 'serverguide/C/web-servers.xml'
--- serverguide/C/web-servers.xml	2014-12-29 16:41:34 +0000
+++ serverguide/C/web-servers.xml	2015-05-06 00:08:48 +0000
@@ -640,6 +640,13 @@
 <command>sudo find /var/www/html -type d -exec chmod g=rwxs "{}" \;</command>
 <command>sudo find /var/www/html -type f -exec chmod g=rws  "{}" \;</command>
 </screen>
+<para>
+    These commands recursively set the group permission on all files and
+    directories in /var/www/html to read write and set user id. This has the
+    effect of having the files and directories inherit their group and permission
+    from their parrent. Many admins find this useful for allowing multiple users
+    to edit files in a directory tree.
+</para>
 
         <note>
           <para>