You can run the following command with the -p and -c options to add a printer to a class:

$sudo lpadmin -p cupsprinter -c cupsclass

The above example shows that the printer cupsprinter has been added to printer class cupsclass:

You can verify whether the printers are in a printer class:

$lpstat -c cupsclass

You need to run lpadmin command with -p and -r options to remove printer from a class. If all the printers from a class are removed, then that class can get deleted automatically.

$sudo lpadmin -p cupsprinter -r cupsclass

The above example shows that the printer cupsprinter has been removed from the printer class, cupsclass:

To remove a class, you can run the lpadmin command with the -x option:

$sudo lpadmin...