Disabling Auto Updates in WordPress
The
DISALLOW_FILE_MODS
constant blocks any kind of filesystem changes, not just by background updates but by all users as well. So, gone are the file editors; the ability to update core, themes, or plugins; and the ability to install new themes or plugins.
I want to disable automatic updates because I update my site by rsyncing to the server from my local copy. So anything that the server downloads itself will get blown away.