Thanks for posting this bug. It's occurring for me as well. I fixed it with a default POSIX ACL on the /var/lib/command-not-found directory.
Full info in this other bug: https://bugs.launchpad.net/command-not- found/+bug/1824000?comments=all -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1827759 Title: Doesn't work properly with umask 027 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/command-not-found/+bug/1827759/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs