On a new desktop install apt complains about ubuntu.sources.curtin.old

[Sebastien Bacher]

Installing Ubuntu Desktop Noble daily with the default options (no encryption, using the only available disk in the VM), on the installed system apt displays those warnings

> N: Ignoring file 'ubuntu.sources.curtin.old' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

[Olivier Gayot (ogayot)]

Hello Seb. Thank you for your bug report,

Indeed, during installation, curtin apt-config backs up the original ubuntu.sources file before making modifications:

https://github.com/canonical/curtin/blob/master/curtin/commands/apt_config.py#L650

I suggest we either remove it completely or use a different extension. By default on noble, the following extensions should be ignored without warning:

$ apt-config dump | grep -F Dir::Ignore-Files-Silently
Dir::Ignore-Files-Silently "";
Dir::Ignore-Files-Silently:: "~$";
Dir::Ignore-Files-Silently:: "\.disabled$";
Dir::Ignore-Files-Silently:: "\.bak$";
Dir::Ignore-Files-Silently:: "\.dpkg-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.ucf-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.save$";
Dir::Ignore-Files-Silently:: "\.orig$";
Dir::Ignore-Files-Silently:: "\.distUpgrade$";

[Server Team CI bot (server-team-bot)]

This bug is fixed with commit a02daee2 to curtin on branch master.
To view that commit see the following URL:
https://git.launchpad.net/curtin/commit/?id=a02daee2

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/2058741

[ajgreeny (ajg-charlbury)]

I have seen the same problem on my KVM/QEMU installs of Xubuntu for the past few days (can't remember when it first appeared) though the system still appears to update packages as it should.
I changes the name of that ubuntu.sources.curtin.old to ubuntu.sources and the error did not appear.

Is the problem simply a misnaming of that file or does it go deeper than that?

[corrado venturini (corradoventu)]

In /etc/apt/sources.list.d they are 2 files:
corrado@corrado-n8-nn-0322:~$ ls /etc/apt/sources.list.d -l
total 8
-rw-r--r-- 1 root root 386 Mar 22 15:08 ubuntu.sources
-rw-r--r-- 1 root root 2580 Mar 22 06:32 ubuntu.sources.curtin.old
corrado@corrado-n8-nn-0322:~$

file ubuntu.sources already exist, how could you rename ubuntu.sources.curtin.old to ubuntu.sources?

[Sebastien Bacher (seb128)]

the fix which has been merged renames the file to be .orig isn't of .old

[ajgreeny (ajg-charlbury)]

Just as a test I have just renamed ubuntu.sources.curtin.old as ubuntu.sources.curtin.orig and no warning or error appeared when running sudo apt update.

Whether or not this is a complete fix remains to be seen but it's a start.
Can I assume that with that new name the file really is being parsed as it should be?

[corrado venturini (corradoventu)]

Same renaming to ubuntu.sources.curtin.save

[Bozkurt (maksimuswindbroken)]

Looks like a fix is released but I'm not sure if it's included in the stable version since I'm still having the same issue. 24.04 LTS Stable. Can I simply remove it?