printer control program
is used by the system administrator to control
the operation of the line printer system. For each line printer configured in
may be used to:
- disable or enable a printer,
- disable or enable a printer's spooling queue,
- rearrange the order of jobs in a spooling queue,
- find the status of printers, and their associated
spooling queues and printer daemons.
Without any arguments, lpc
will prompt for commands
from the standard input. If arguments are supplied,
interprets the first argument as a command
and the remaining arguments as parameters to the command. The standard input
may be redirected causing lpc
to read commands
from file. Commands may be abbreviated; the following is the list of
- Print a short description of each command specified in the
argument list, or, if no argument is given, a list of the recognized
- Terminate an active spooling daemon on the local host
immediately and then disable printing (preventing new daemons from being
started by lpr(1)) for the
- Remove any temporary files, data files, and control files
that cannot be printed (i.e., do not form a complete printer job) from the
specified printer queue(s) on the local machine.
- Turn the specified printer queues off. This prevents new
printer jobs from being entered into the queue by
- Turn the specified printer queue off, disable printing and
put message in the printer status file. The
message doesn't need to be quoted, the remaining arguments are treated
like echo(1). This is normally
used to take a printer down and let users know why.
lpq(1) will indicate the
printer is down and print the status message.
- Enable spooling on the local queue for the listed printers.
This will allow lpr(1) to put
new jobs in the spool queue.
- Exit from lpc.
- Attempt to start a new printer daemon. This is useful when
some abnormal condition causes the daemon to die unexpectedly, leaving
jobs in the queue. lpq(1) will
report that there is no daemon present when this condition occurs. If the
user is the superuser, try to abort the current daemon first (i.e., kill
and restart a stuck daemon).
- Enable printing and start a spooling daemon for the listed
- Display the status of daemons and queues on the local
- Stop a spooling daemon after the current job completes and
- Place the jobs in the order listed at the top of the
- Enable everything and start a new printer daemon. Undoes
the effects of down.
- printer description file
- spool directories
- lock file for queue control
- ?Ambiguous command
- Abbreviation matches more than one command.
- ?Invalid command
- No match was found.
- ?Privileged command
- You must be a member of group “operator” or
user “root” to execute this command.
command appeared in