Ubuntu 18.04 LTS -- Printing Service Not Available

Solution 1:

I had same problem. Config file is incorrectly located. Follow directions as per this link. https://ubuntu-mate.community/t/cups-service-stopped-um-18-04/17381

There is a default configuration file which should be installed in /usr/share/cups/cupsd.conf.default so I ran:

sudo cp /usr/share/cups/cupsd.conf.default /etc/cups/cupsd.conf
sudo service cups restart