Upgrade procedure for servers.
Before upgrading install the LAMP task selection and OpenSSH task selection.
sudo tasksel --section server
Make sure your current installation is up to date with:
sudo apt-get update sudo apt-get upgrade
sudo apt-get install update-manager-core
Launch the upgrade tool:
sudo do-release-upgrade -d
- Follow the on-screen instructions
- Confirm that all packages upgrade sucessfully
Test basic server functionality as described here