Quote:
Originally Posted by scottro
But I figured I'd throw it out there for those who can't get their printers working.
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TCP port 9100 is for the JetDirect protocol, introduced by HP back in 1991. It is an extremely simple protocol, as it is just a TCP receiver.
Netcat -- nc(1) -- can be used to send any file to be printed with JetDirect, as long as it is in a format understood by the printer, such as Postscript, PDF, or PCL. Typically, JetDirect connectivity is just one of several network provisioning options for print spooling subsystem such as CUPS.