I think it would be good to write a release note entry about this change for Ubuntu 21.10 and possibly updating the release notes for Ubuntu 20.04.3 (if these changes make it there in time).
** Also affects: ubuntu-release-notes Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1927078 Title: Don't allow useradd to use fully numeric names To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/1927078/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs