ok - I tried the command (su -c 'journalctl -u cups.service --since="None" --until="2016-09-27 18:17:05"' > troubleshoot-logs.txt) on my current system (Ubuntu 18.04.1). I think I ran into the same problem. The "su" command doesn't tell me who's password it's asking for - turns out it's the superuser password. On my systems there is no superuser password so that command (su) is doomed to fail regardless. Cups needs to be updated at least for Ubuntu. Typically Ubuntu configures the initial user in the sudoers file so someone at least can become the super user. The command to do that is "sudo". Also becoming the super user doesn't seem to be necessary. I executed "journalctl -u cups.service" and it worked fine. Lastly journalctl couldn't parse "None" or "none" as a time indicator.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1628314 Title: Cups trouble shooter asked me to run a command that doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1628314/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
