To create a printer in CUPS that sends the data nowhere (like
/dev/null), there are many ways. This page uses the
What we need is the TCP Discard service on port 9. Xinetd has
it built-in, so we can just use that. Make sure that the following definition
is available in xinetd's configuration file(s), usually
/etc/xinetd.d/discard. It should contain a service like the
type = INTERNAL
id = discard-stream
socket_type = stream
protocol = tcp
user = root
wait = no
disable = no
FLAGS = IPv6 IPv4
rcxinetd reload to reread the configuration
files and activate the new
discard service. Or use
start if xinetd was not already active.
Now go to the CUPS web frontend and add a new printer. As
socket://localhost:9/, as printer choose
something that looks featureful, for example the "HP 2500C Foomatic/pcl3".
That's all there is to it.