I'm a bit on a loss here. Since WP 3.7 you can update your wordpress automatically. Since then it's more hit and miss on several servers here. I would like to understand, if it is enough to enable automatic updates described here and how this would work without a cron job.
I'm under the impression right now, that the upgrade is only started, when ever someone logs into the backend, is this correct? If so, is there a way to automate the updates via a cron job?