To-do's when upgrading Ubuntu EOL 20.10 to 22.04.1
24 Aug 2022 • 2 min. read
Warning for non-experienced users
General recommendation from Canonical is making a backup and re-install your system should you run a non-secure EOL release. Their advice is sound and often proves to be the safest way. So, if you still decide to give my post a try, don’t dare yelling at me when your system goes bonkers. I told you so.
List of commands
$ sudo apt-get update
[sudo] password for lgeurts:
# You should see output similar to this.
E: The repository 'http://old-releases.ubuntu.com/ubuntu groovy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://old-releases.ubuntu.com/ubuntu groovy-updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://old-releases.ubuntu.com/ubuntu groovy-security Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
# Next test, spewing more jibberish.
$ sudo do-release-upgrade
Please install all available updates for your release before upgrading.
# Clean the apt cache.
$ sudo rm -rf /var/lib/apt/lists/*
# Remove old kernels and all automatically installed dependencies that are no longer needed by any package.
$ sudo apt --purge autoremove
# Replace entries in sources files.
$ sudo sed -i "s/old-releases/archive/g" /etc/apt/sources.list /etc/apt/sources.list.d/*.list
# These 3 echo commands are for making sure you really have the correct entries even the above should have done the trick.
# Can also use any editor you want if that makes you feel more comfy.
$ echo "[deb http://old-releases.ubuntu.com/ubuntu/ groovy main restricted universe multiverse]" | sudo tee -a /etc/apt/sources.list
$ echo "[deb http://old-releases.ubuntu.com/ubuntu/ groovy-updates main restricted universe multiverse]" | sudo tee -a /etc/apt/sources.list
$ echo "[deb http://old-releases.ubuntu.com/ubuntu/ groovy-security main restricted universe multiverse]" | sudo tee -a /etc/apt/sources.list
# Kick it.
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get dist-upgrade # do-release does this again.
$ sudo apt install update-manager-core
$ sudo do-release-upgrade
Final remarks
When finished, clean up (sudo apt autoclean | sudo apt autoremove), check those non apt installed apps, and renew your custom PPAs.