Install cups-pk-helper by entering the following commands in the terminal:
sudo apt update sudo apt install cups-pk-helper
Description:
PolicyKit helper to configure cups with fine-grained privileges
This package provides a PolicyKit helper to configure cups with fine-grained privileges. For example, it's possible to let users enable/disable printers without requiring a password, while still requiring a password for editing printer settings.
Homepage: http://www.freedesktop.org/wiki/Software/cups-pk-helper
Version: 0.2.6-1ubuntu1
Section: gnome