I have used Ubuntu for years, upgrading every 6 months, and never had this issue before. When I go to localhost:631, CUPS admin page displays, but when I try to make admin changes, such as modify a printer, it prompts for user and password, as usual, but will not accept my credentials. I have tried:
1. Logging out of Ubuntu and back in again
2. Clearing browser cookies & cache
3. Captilized & non versions of my user name
4. Entering these commands in terminal:
sudo usermod -aG lpadmin <username>
sudo /etc/init.d/cups restart
There are no other users on this machine, mine is the only account, and I do have admin privileges.
Thanks,
Les.
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