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32 .\" @(#)reboot.8 8.1 (Berkeley) 6/9/93
33 .\"
34 .Dd June 9, 1993
35 .Dt REBOOT 8
36 .Os
37 .Sh NAME
38 .Nm reboot ,
39 .Nm halt
40 .Nd
41 stopping and restarting the system
42 .Sh SYNOPSIS
43 .Nm halt
44 .Op Fl nq
45 .Nm reboot
46 .Op Fl nq
47 .Sh DESCRIPTION
48 The
49 .Nm halt
50 and
51 .Nm reboot
52 utilities flush the file system cache to disk, send all running processes
53 a SIGTERM (and subsequently a SIGKILL) and, respectively, halt or restart
54 the system.
55 The action is logged, including entering a shutdown record into the login
56 accounting file.
57 .Pp
58 The options are as follows:
59 .Bl -tag -width Ds
60 .It Fl n
61 If the
62 .Fl n
63 option is specified,
64 the file system cache is not flushed.
65 This option should probably not be used.
66 .It Fl q
67 If the
68 .Fl q
69 option is specified,
70 the system is halted or restarted quickly and ungracefully, and only
71 the flushing of the file system cache is performed.
72 This option should probably not be used.
73 .El
74 .Pp
75 Normally, the
76 .Xr shutdown 8
77 utility is used when the system needs to be halted or restarted, giving
78 users advance warning of their impending doom.
79 .Sh SEE ALSO
80 .Xr sync 1 ,
81 .Xr utmp 5 ,
82 .Xr boot 8 ,
83 .Xr shutdown 8
84 .Sh HISTORY
85 A
86 .Nm reboot
87 command appeared in
88 .At v6 .