How to upgrade Kubuntu to the latest version

Kubuntu is an official Ubuntu flavor that integrates the Plasma desktop and various KDE applications. It relies on the same core system components as Ubuntu while providing a customizable graphical interface. System updates are managed through the APT package manager to ensure security patches, bug fixes, and new features.

Maintaining an up-to-date system is important to avoid compatibility issues with libraries, drivers, and third-party applications. Frequent updates keep the operating system aligned with evolving technologies. Despite using APT under the hood, Kubuntu provides additional desktop tools to streamline the upgrade process.

Before initiating any version upgrade, create a reliable backup of critical files. Older hardware or custom configurations may require additional caution and testing. Always review the release notes for the new version to identify potential changes or limitations that may impact workflow or system stability.

1. Open a terminal emulator from the KDE Plasma menu.
2. Update system repositories.

   $ sudo apt update
   Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease
   Reading package lists... Done

3. Upgrade all packages.

   $ sudo apt --assume-yes full-upgrade
   Reading package lists... Done
   Building dependency tree       
   Reading state information... Done

4. Install the Kubuntu release upgrader.

   $ sudo apt --assume-yes install ubuntu-release-upgrader-core
   Reading package lists... Done
   Building dependency tree       
   Reading state information... Done

5. Initiate the distribution upgrade.

   $ sudo do-release-upgrade --frontend=DistUpgradeViewGtk3 --allow-third-party
   Checking for a new Ubuntu release
   Getting upgrade prerequisites

6. Follow the prompts on screen to complete the upgrade process.
7. Reboot after completion to load the new release.