The following process works with all WordPress versions after version 3.7. Alas, turning off Automatic Background Updates is strongly discouraged.
The core developers made a conscious decision to enable automatic updates for minor releases and translation files out of the box. Going forward, this will be one of the best ways to guarantee your site stays up to date and secure and, as such, disabling these updates is strongly discouraged.
For a refresher on editing files with vim see: New User Tutorial: Overview of the Vim Text Editor
Navigate to your root WordPress directory (in this case: /home/example/public_html) and edit the wp-config.php file:
Add the following to the file:
/* Disable Automatic Background Updates for WordPress */
define(‘AUTOMATIC_UPDATER_DISABLED’, true );
In this case, I added the above code just above:
/* That’s all, stop editing! Happy blogging. */
Then exit and save the file with the command :wq .