NAME

     lpc — line printer control program

SYNOPSIS

     lpc [command [argument ...]]

DESCRIPTION

     lpc is used by the system administrator to control the operation of the line printer system.
     For each line printer configured in /etc/printcap, lpc 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, lpc 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 recognized
     commands.

     ? [command ...]
     help [command ...]
             Print a short description of each command specified in the argument list, or, if no
             argument is given, a list of the recognized commands.

     abort { all | printer }
             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 specified
             printers.

     clean { all | printer }
             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.

     disable { all | printer }
             Turn the specified printer queues off.  This prevents new printer jobs from being
             entered into the queue by lpr(1).

     down { all | printer } message [...]
             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 { all | printer }
             Enable spooling on the local queue for the listed printers.  This will allow lpr(1)
             to put new jobs in the spool queue.

     exit
     quit    Exit from lpc.

     restart { all | printer }
             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).

     start { all | printer }
             Enable printing and start a spooling daemon for the listed printers.

     status { all | printer }
             Display the status of daemons and queues on the local machine.

     stop { all | printer }
             Stop a spooling daemon after the current job completes and disable printing.

     topq printer [ jobnum ... ] [ user ... ]
             Place the jobs in the order listed at the top of the printer queue.

     up { all | printer }
             Enable everything and start a new printer daemon.  Undoes the effects of down.

FILES

     /etc/printcap             printer description file
     /var/spool/output/*       spool directories
     /var/spool/output/*/lock  lock file for queue control

DIAGNOSTICS

     ?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.

SEE ALSO

     lpq(1), lpr(1), lprm(1), printcap(5), lpd(8)

HISTORY

     The lpc command appeared in 4.2BSD.