Change directory and folder permissions on mass

Recently, I was doing some work on the on a MediaWiki installation. For some reason I had all the permissions set up wrong.

Obviously, MediaWiki has thousands of files to change.

So first of all, in the shell, I ran the command from public_html directory:

find -xtype f |xargs chmod 644

That changed the the files. I then ran the following command from the public_html director:

find -xtype d | xargs   chmod 755