EOL upgrades: Upgrade from Ubuntu 23.04 to 24.04

When upgrading from Ubuntu 23.04 to 24.04, you may hit this error: An upgrade from 'lunar' to 'noble' is not supported with this tool.

The error occurred because we need to upgrade to 23.10 first and then to 24.04. This article show you how to do that.

Steps

1. Backup your systems, files, etc. in case anything goes wrong.

2. Download legacy upgrader tool: https://changelogs.ubuntu.com/meta-release. For 23.10, the code name is mantic. 

   Dist: mantic
   Name: Mantic Minotaur
   Version: 23.10
   Date: Thu, 12 October 2023 23:10:00 UTC
   Supported: 0
   Description: This is the 23.10 release
   Release-File: http://archive.ubuntu.com/ubuntu/dists/mantic-updates/Release
   ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement
   UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/mantic-updates/main/dist-upgrader-all/current/mantic.tar.gz
   UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/mantic-updates/main/dist-upgrader-all/current/mantic.tar.gz.gpg

3. Download upgrade tool: http://archive.ubuntu.com/ubuntu/dists/mantic-updates/main/dist-upgrader-all/current/mantic.tar.gz:

   wget http://archive.ubuntu.com/ubuntu/dists/mantic-updates/main/dist-upgrader-all/current/mantic.tar.gz

   
   

4. Unzip it:

   mkdir upgrader
   tar -xaf mantic.tar.gz -C upgrader

5. Run upgrade tool:

   cd upgrader/
   sudo ./manic

6. Follow the guide to complete the upgrade:

   
   

7. Once the upgrade to 23.10 is completed, run upgrade tool to update to 24.04 or use Software Updater:

   update-manager -c

   
   

8. Click Upgrade button to start upgrading to the latest version.

   
   

References

https://help.ubuntu.com/community/EOLUpgrades