Being able to upgrade Ubuntu from one version to the next is one of Ubuntu’s best features. You benefit from getting the latest software, including new security patches, and all the upgraded technology that comes with a new release without having to resort to reinstalling and reconfiguring your system.
Best of all, upgrading Ubuntu to the latest release is easy. As we’ll demonstrate!
If you are upgrading from Ubuntu 14.04, please read the upgrade notes for more information.
For more recent versions, please read the release notes for Ubuntu 18.04.