Upgrade Ubuntu 21.10 LTS (Long Term Support) to the latest development version of Ubuntu 22.04 release.
Check operating system version before release upgrade.
$ lsb_release -a
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 21.10 Release: 21.10 Codename: impish
Update package index.
$ sudo apt update
Upgrade operating system.
$ sudo apt upgrade
Use do-release-upgrade utility to check for a new release.
$ do-release-upgrade --check-dist-upgrade-only
Checking for a new Ubuntu release No new release found.
Check for a new development release.
$ do-release-upgrade --check-dist-upgrade-only --devel-release
Checking for a new Ubuntu release New release '22.04' available. Run 'do-release-upgrade' to upgrade to it.
Release upgrade requires reboot after an update.
$ sudo do-release-upgrade --devel-release
Checking for a new Ubuntu release You have not rebooted after updating a package which requires a reboot. Please reboot before upgrading.
Reboot operating system.
$ sudo reboot
Perform release upgrade.
$ sudo do-release-upgrade --devel-release
Checking for a new Ubuntu release = Welcome to the Ubuntu 'Jammy Jellyfish' development release = ''This release is still in development.'' Thanks for your interest in this development release of Ubuntu. The Ubuntu developers are moving very quickly to bring you the absolute latest and greatest software the Open Source Community has to offer. This development release brings you a taste of the newest features for the next version of Ubuntu. == Testing == Please help to test this development snapshot and report problems back to the developers. For more information about testing Ubuntu, please read: http://www.ubuntu.com/testing == Reporting Bugs == This development release of Ubuntu contains bugs. If you want to help out with bugs, the Bug Squad is always looking for help. Please read the following information about reporting bugs: http://help.ubuntu.com/community/ReportingBugs Then report bugs using apport in Ubuntu. For example: ubuntu-bug linux will open a bug report in Launchpad regarding the linux package. Your comments, bug reports, patches and suggestions will help fix bugs and improve future releases. == Participate in Ubuntu == If you would like to help shape Ubuntu, take a look at the list of ways you can participate at http://www.ubuntu.com/community/participate/ == More Information == You can find out more about Ubuntu on the Ubuntu website and Ubuntu wiki. http://www.ubuntu.com/ http://wiki.ubuntu.com/ To sign up for Ubuntu development announcements, please subscribe to Ubuntu's development announcement list at: http://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-announce Continue [yN] y Get:1 Upgrade tool signature [819 B] Get:2 Upgrade tool [1258 kB] Fetched 1259 kB in 0s (0 B/s) authenticate 'jammy.tar.gz' against 'jammy.tar.gz.gpg' extracting 'jammy.tar.gz' Reading cache Checking package manager Reading package lists... Done Building dependency tree... Done Reading state information... Done Hit http://pl.archive.ubuntu.com/ubuntu impish InRelease Hit http://pl.archive.ubuntu.com/ubuntu impish-updates InRelease Hit http://pl.archive.ubuntu.com/ubuntu impish-backports InRelease Hit http://security.ubuntu.com/ubuntu impish-security InRelease Hit https://deb.librewolf.net impish InRelease Hit http://ppa.launchpad.net/apt-fast/stable/ubuntu impish InRelease Fetched 0 B in 0s (0 B/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done Checking for installed snaps Calculating snap size requirements Updating repository information [...] Checking package manager Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating the changes Calculating the changes Do you want to start the upgrade? 9 packages are going to be removed. 165 new packages are going to be installed. 2041 packages are going to be upgraded. You have to download a total of 2078 M. This download will take about 4 minutes with your connection. Installing the upgrade can take several hours. Once the download has finished, the process cannot be canceled. Continue [yN] Details [d] y Fetching [...] Upgrading [...] Processing snap replacements [...] Remove obsolete packages? 164 packages are going to be removed. Removing the packages can take several hours. Continue [yN] Details [d] y [...] System upgrade is complete. Restart required To finish the upgrade, a restart is required. If you select 'y' the system will be restarted. Continue [yN] y
Operating system version after release upgrade.
$ lsb_release -a
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Jammy Jellyfish (development branch) Release: 22.04 Codename: jammy
The do-release-upgrade utility is provided by the ubuntu-release-upgrader-core package.
