Apparently you uninstalled the apport package? That's what provides ubuntu-bug, and it's installed by default in Xubuntu.
** Package changed: systemd (Ubuntu) => ubuntu ** Changed in: ubuntu Status: In Progress => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1504247 Title: program "ubuntu-bug" missing in /usr/bin --> unable to report bugs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1504247/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs