Upgrading Moodle

Rename the current production Moodle folder

mv /path/to/current/moodle-folder/ /path/to/current/moodle-folder_old
Upload/copy/move the new installation folder and rename to current Moodle production folder, i.e. if the production folder was named learn.azandi.co.za then rename the new folder to learn.azandi.co.za
Restore the permissions/ownership of the folder and files

chowen -R apache:apache /path/to/current/moodle-folder
Navigate to the Moodle platform website in a browser and follow the onscreen prompts

Post Upgrade Tasks

Check and restore all custom settings where necessary
Check Moodle to ensure site is functioning as at it should and rectify any issues
Take Moodle out of maintenance mode