Aqui está outra abordagem . Ele usa um script de shell para imprimir o documento uma vez para cada impressora e configura esse script como a interface.
#!/bin/bash
# if you don't have bash, use /bin/sh
# don't leave off the first line - absolutely needed for cups!
/usr/bin/lp -dprinter1 $6
/usr/bin/lp -dprinter2 $6
/usr/bin/lp -dprinter3 $6
chmod 755 ~/myinterfacefile
lpadmin -p threeprint -E -i ~/myinterfacefile -v /dev/null
Sending jobs to "threeprint" (lp -d threeprint somefile) will now print on all three printers.