xref: /dragonfly/sbin/reboot/reboot.8 (revision a4da4a90)
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28.\"	@(#)reboot.8	8.1 (Berkeley) 6/9/93
29.\" $FreeBSD: src/sbin/reboot/reboot.8,v 1.10.2.7 2003/02/23 22:42:10 trhodes Exp $
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31.Dd June 9, 2020
32.Dt REBOOT 8
33.Os
34.Sh NAME
35.Nm reboot ,
36.Nm halt ,
37.Nm fastboot ,
38.Nm fasthalt
39.Nd stopping and restarting the system
40.Sh SYNOPSIS
41.Nm halt
42.Op Fl lnqp
43.Nm
44.Op Fl dlnqp
45.Nm fasthalt
46.Op Fl lnqp
47.Nm fastboot
48.Op Fl dlnqp
49.Sh DESCRIPTION
50The
51.Nm halt
52and
53.Nm
54utilities flush the file system cache to disk, send all running processes
55a
56.Dv SIGTERM
57(and subsequently a
58.Dv SIGKILL )
59and, respectively, halt or restart the system.
60The action is logged, including entering a shutdown record into the
61.Xr wtmpx 5
62file.
63.Pp
64The options are as follows:
65.Bl -tag -width indent
66.It Fl d
67The system is requested to create a crash dump.
68This option is
69supported only when rebooting, and it has no effect unless a dump
70device has previously been specified with
71.Xr dumpon 8 .
72.It Fl l
73The halt or reboot is
74.Em not
75logged to the system log.
76This option is intended for applications such as
77.Xr shutdown 8 ,
78that call
79.Nm
80or
81.Nm halt
82and log this themselves.
83.It Fl n
84The file system cache is not flushed.
85This option should probably not be used.
86.It Fl p
87The system will turn off the power if it can.
88If the power down action fails, the system
89will halt or reboot normally, depending on whether
90.Nm halt
91or
92.Nm
93was called.
94.It Fl q
95The system is halted or restarted quickly and ungracefully, and only
96the flushing of the file system cache is performed (if the
97.Fl n
98is not specified).
99This option should probably not be used.
100.El
101.Pp
102The
103.Nm fasthalt
104and
105.Nm fastboot
106utilities are nothing more than aliases for the
107.Nm halt
108and
109.Nm
110utilities.
111.Pp
112Normally, the
113.Xr shutdown 8
114utility is used when the system needs to be halted or restarted, giving
115users advance warning of their impending doom and cleanly terminating
116specific programs.
117.Sh SEE ALSO
118.Xr wtmpx 5 ,
119.Xr boot 8 ,
120.Xr dumpon 8 ,
121.Xr savecore 8 ,
122.Xr shutdown 8 ,
123.Xr sync 8
124.Sh HISTORY
125A
126.Nm
127command appeared in
128.Bx 4.0 .
129