Website Upgrade Joomla

Preparation

1. Backup the site with Akeeba Backup.
2. Restore the backup to the test site.
3. Upgrade the Joomla! version of the test site.
4. Upgrade all important Joomla extensions.
5. Test the site.
6. Run a link checker W3C Link Checker.

Upgrade

1. Backup the site with Akeeba Backup.
2. Set the site to offline.
3. Upgrade the Joomla! version by downloading the latest package from the Joomla! website.
4. Upgrade all important Joomla extensions
5. Apply core customatisation.
6. Set the site to online.