87 lines
2.9 KiB
Groff
87 lines
2.9 KiB
Groff
.\" Copyright (c) 1980, 1991 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)halt.8 6.5 (Berkeley) 3/16/91
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.\" $Id: halt.8,v 1.4 1993/08/01 07:39:07 mycroft Exp $
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.\"
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.Dd March 16, 1991
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.Dt HALT 8
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.Os BSD 4
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.Sh NAME
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.Nm halt
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.Nd stop the processor
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.Sh SYNOPSIS
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.Nm halt
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.Op Fl n
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.Op Fl q
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.Op Fl y
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.Sh DESCRIPTION
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.Nm Halt
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writes out sandbagged information to the disks and then stops
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the processor. The machine does not reboot, even if the auto-reboot
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switch is set on the console.
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.Pp
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Available options for
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.Nm halt :
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.Bl -tag -width Ds
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.It Fl n
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No sync before stopping.
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.It Fl q
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Quick halt, no graceful shutdown is attempted.
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.It Fl y
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This option is needed if you are trying to halt the system from a dialup.
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.El
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.Pp
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.Nm Halt
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normally logs the shutdown using
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.Xr syslog 8
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and places a shutdown record in the login accounting file
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.Pa /var/log/wtmp.
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These actions are inhibited if the
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.Fl n
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or
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.Fl q
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options are present.
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.Sh SEE ALSO
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.Xr reboot 8 ,
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.Xr shutdown 8 ,
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.Xr syslogd 8
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.Sh BUGS
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It is very difficult to halt a
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.Tn VAX ,
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as the machine wants to then
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reboot itself. A rather tight loop suffices.
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Bx 4.0 .
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