Seems like a python error. Would you check so /usr/share/pyshared/CommandNotFound exists? You can also try reinstalling command-not-found.
-- "No module named CommandNotFound" https://bugs.launchpad.net/bugs/268945 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
