IT/Software/Applications/CUPS

this is the wonderful and mysteriously dreadful Common Unix Printing System.

Over the years I have logged/wasted/learned for countless hours.

To restart local printer services you need.

sudo service cups restart

To restart the network broadcast(sharing) and browsing(using others) you need.

sudo service cups-browsed restart && sudo service cups restart

Usually best to just start over by running three commands.
sudo apt-get install --reinstall cups cups-browsed cups-client cups-common cups-daemon cups-server-common

then:

sudo systemctl daemon-reload

You can check the statuses with

service cups status

service cups-browsed status