/share/doc/smm/07.lpd/6.t

 1.\" Copyright (c) 1983, 1993
 2.\"	The Regents of the University of California.  All rights reserved.
 3.\"
 4.\" Redistribution and use in source and binary forms, with or without
 5.\" modification, are permitted provided that the following conditions
 6.\" are met:
 7.\" 1. Redistributions of source code must retain the above copyright
 8.\"    notice, this list of conditions and the following disclaimer.
 9.\" 2. Redistributions in binary form must reproduce the above copyright
10.\"    notice, this list of conditions and the following disclaimer in the
11.\"    documentation and/or other materials provided with the distribution.
12.\" 3. All advertising materials mentioning features or use of this software
13.\"    must display the following acknowledgement:
14.\"	This product includes software developed by the University of
15.\"	California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\"    may be used to endorse or promote products derived from this software
18.\"    without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\"	@(#)6.t	8.1 (Berkeley) 6/8/93
33.\"
34.NH 1
35Line printer Administration
36.PP
37The
38.I lpc
39program provides local control over line printer activity.
40The major commands and their intended use will be described.
41The command format and remaining commands are described in
42.IR lpc (8).
43.LP
44\fBabort\fP and \fBstart\fP
45.IP
46.I Abort
47terminates an active spooling daemon on the local host immediately and
48then disables printing (preventing new daemons from being started by
49.IR lpr ).
50This is normally used to forcibly restart a hung line printer daemon
51(i.e., \fIlpq\fP reports that there is a daemon present but nothing is
52happening).  It does not remove any jobs from the queue
53(use the \fIlprm\fP command instead).
54.I Start
55enables printing and requests \fIlpd\fP to start printing jobs.
56.LP
57\fBenable\fP and \fBdisable\fP
58.IP
59\fIEnable\fP and \fIdisable\fP allow spooling in the local queue to be
60turned on/off.
61This will allow/prevent
62.I lpr
63from putting new jobs in the spool queue.  It is frequently convenient
64to turn spooling off while testing new line printer filters since the
65.I root
66user can still use
67.I lpr
68to put jobs in the queue but no one else can.
69The other main use is to prevent users from putting jobs in the queue
70when the printer is expected to be unavailable for a long time.
71.LP
72\fBrestart\fP
73.IP
74.I Restart
75allows ordinary users to restart printer daemons when
76.I lpq
77reports that there is no daemon present.
78.LP
79\fBstop\fP
80.IP
81.I Stop
82halts a spooling daemon after the current job completes;
83this also disables printing.  This is a clean way to shutdown a
84printer to do maintenance, etc.  Note that users can still enter jobs in a
85spool queue while a printer is
86.IR stopped .
87.LP
88\fBtopq\fP
89.IP
90.I Topq
91places jobs at the top of a printer queue.  This can be used
92to reorder high priority jobs since
93.I lpr
94only provides first-come-first-serve ordering of jobs.