Migrating to deb822 sources on upgrade to Mantic

Nick Rosbrook nick.rosbrook at canonical.com
Tue Sep 19 19:25:47 UTC 2023

> As a part of the effort to use deb822 sources by default in Ubuntu[1],
> on upgrades to Mantic, ubuntu-release-upgrader will migrate
> /etc/apt/sources.list to /etc/apt/sources.list.d/ubuntu.sources, and
> /etc/apt/sources.list.d/foo.list to
> /etc/apt/sources.list.d/foo.sources. This change has been implemented
> and is now in mantic.

The release goal to have deb822 by default in Mantic has been pushed
back, hence ubuntu-release-upgrader will no longer migrate users to

The deb822 sources are still usable, and apt will have no problem with
them. The most notable blocker right now is that the
software-properties UI cannot handle the deb822 format yet[1]. If you
have already upgraded to Mantic, and would like to revert to the
classic sources.list, you should be able to do so with:

$ cp /etc/apt/sources.list{.distUpgrade,}
$ rm /etc/apt/sources.list.d/ubuntu.sources


[1] https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/2033949

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