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

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 1.\" Copyright (c) 1983, 1993
 2.\"	The Regents of the University of California.  All rights reserved.
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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.