Home / ubuntu / Questions / 387217
In Process
d3rdon
Asked: 2013-12-07 12:20:31 +0800 CST

Cups admin user and password Saucy

  • 772

I can't change settings on my cups printer. He asks me for a username and password i already added for me the usergroup lpadmin . But nothing changes after a restart of cups. Still asking me for username and password and my user is not working.

printing

5 Answers

  1. I had the same problem.

    I seem to have fixed it with the command:

    sudo usermod -a -G lpadmin pi

    This adds the user name pi to the cups user group lpadmin. You can then use the default user name "pi" and password "raspberry" when prompted.

    • 7

  2. Check if cups is accessible on your localhost through the webinterface

    Listen localhost:631
WebInterface Yes

    in /etc/cups/cupsd.conf. Then restart cups using

    sudo killall cupsd
sudo /etc/init.d/cups restart

    and check if you user is part of the group lpadmin

    cat /etc/group | grep YOUR-USERNAME

    After that you should be able to access cups with you username & pwd on http://127.0.0.1:631/

    If it still fails check the cups error log here

    tail -f /var/log/cups/error_log

    P.S. you might also want to read this thread.

    • 4
    • You can use credentials of any user who is in the lpadmin group.

    • To see the list of users in lpadmin group, use the command in a root shell

      cat /etc/group | grep lpadmin

    • 2

  4. Just upgraded a bunch of client computers from 14.04 to 16.04 on and ran into this issue.
    This appears to be the problem:
    https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1157318

    The fix

    apt install apparmor-utils
aa-complain /etc/apparmor.d/usr.sbin.cupsd

    Of course, make sure you really have your user ID in the lpadmin group, as the OP stated.

    • 1

  5. If you ended up here like me on a newer version, 18.04, you should already be apart of this group. So your username and password should work.

    • 0