Cups inner working question.

[Kurt Pfeifle]

> I use lpr to print. I've configured /etc/cups/client.conf
> ServerName mycups.server.domainname

If the "lpr" you use to print is the same-named client print command that is part of CUPS this should work already out of the box (provided the name resolution works for "mycups.server.domainname").

> But i still doesn't understand how i can print from a client even
> if the cups's scheduler is not running on that client machine.

The client print commands ("lp" or "lpr") can pick up the CUPS server via various means:

 (1) an environment variable ("CUPS_SERVER=mycups.server.domain")
 (2) or the "ServerName" directive in the /etc/cups/client.conf file
 (3) or, user specific, "ServerName" in the ~/.cups/client.conf file
 (4) or from the commandline "-h" parameter:
      "lp -h mycups.server.domain -d printername"
      "lpr -h mycups.server.domain -P printername"

IIRC, (4) has precedence over (3), which has precedence over (2), which has over (1).

Important: if the "lpr" command you use is *not* the CUPS-provided one, you must set up the CUPS server to receive jobs from traditional LPR/LPD clients. This is achieved by using the CUPS mini-lpd daemon. See "man cups-lpd".

--
Kurt Pfeifle
System & Network Printing Consultant ---- Linux/Unix/Windows/Samba/CUPS
Infotec Deutschland GmbH - A RICOH Company .......... Stuttgart/Germany
(currently killing time in a KL Internet Cafe, waiting for a bus to SG)

;-)