Trace: • ubuntu_release_upgrades

Ubuntu Release Upgrades

Install upgrade software: 

aptitude install update-manager-core

Set the preferences for release upgrades in /etc/update-manager/release-upgrades and set the prompt to never, lts or normal

Start the release upgrade: 

do-release-upgrade -d

This will open an SSH service on port 1022 to gain access. Add a rule to your firewall first to make sure you can get in.