Wordpress Update

Unfortunately - the default ubuntu install is a bit too broken to allow for an automated update in general.

Major Releases of WordPress Core

0) Read the releases notes https://codex.wordpress.org/Version_VERSION (substitute the right version number for VERSION)

1) Consider making a backup of the database. This can be done via the Hetzner konsoleH control panel.
1) Apply update using the Updates page

2) Cursory tests and declare victory.
3) Then let the mailing list know and ask people to be on the alert for issues.

Minor Core + Plugin updates

Follow the following process

1. Log into WordPress with a user that has administrator access.
2. Navigate to the 'Updates' page
3. Review the available updates.
4. Work through the updates one at a time starting from smallest updates, minor and patch releases.