1*47462Scael.\" Copyright (c) 1980, 1991 The Regents of the University of California. 235596Sbostic.\" All rights reserved. 318877Smckusick.\" 443784Strent.\" %sccs.include.redist.man% 518877Smckusick.\" 6*47462Scael.\" @(#)halt.8 6.5 (Berkeley) 03/16/91 735596Sbostic.\" 8*47462Scael.Dd 9*47462Scael.Dt HALT 8 10*47462Scael.Os BSD 4 11*47462Scael.Sh NAME 12*47462Scael.Nm halt 13*47462Scael.Nd stop the processor 14*47462Scael.Sh SYNOPSIS 15*47462Scael.Nm halt 16*47462Scael.Op Fl n 17*47462Scael.Op Fl q 18*47462Scael.Op Fl y 19*47462Scael.Sh DESCRIPTION 20*47462Scael.Nm Halt 2118877Smckusickwrites out sandbagged information to the disks and then stops 2218877Smckusickthe processor. The machine does not reboot, even if the auto-reboot 2318877Smckusickswitch is set on the console. 24*47462Scael.Pp 25*47462ScaelAvailable options for 26*47462Scael.Nm halt : 27*47462Scael.Bl -tag -width Ds 28*47462Scael.It Fl n 29*47462ScaelNo sync before stopping. 30*47462Scael.It Fl q 31*47462ScaelQuick halt, no graceful shutdown is attempted. 32*47462Scael.It Fl y 33*47462ScaelThis option is needed if you are trying to halt the system from a dialup. 34*47462Scael.El 35*47462Scael.Pp 36*47462Scael.Nm Halt 3728720Skarelsnormally logs the shutdown using 38*47462Scael.Xr syslog 8 3928720Skarelsand places a shutdown record in the login accounting file 40*47462Scael.Pa /var/log/wtmp. 4128720SkarelsThese actions are inhibited if the 42*47462Scael.Fl n 4328720Skarelsor 44*47462Scael.Fl q 4528720Skarelsoptions are present. 46*47462Scael.Sh SEE ALSO 47*47462Scael.Xr reboot 8 , 48*47462Scael.Xr shutdown 8 , 49*47462Scael.Xr syslogd 8 50*47462Scael.Sh BUGS 51*47462ScaelIt is very difficult to halt a 52*47462Scael.Tn VAX , 53*47462Scaelas the machine wants to then 5418877Smckusickreboot itself. A rather tight loop suffices. 55*47462Scael.Sh HISTORY 56*47462ScaelThe 57*47462Scael.Nm 58*47462Scaelcommand appeared in 59*47462Scael.Bx 4.0 . 60