1SHUTDOWN(8)                        shutdown                        SHUTDOWN(8)
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NAME

6       shutdown - Halt, power-off or reboot the machine
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SYNOPSIS

9       shutdown [OPTIONS...] [TIME] [WALL...]
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DESCRIPTION

12       shutdown may be used to halt, power-off or reboot the machine.
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14       The first argument may be a time string (which is usually "now").
15       Optionally, this may be followed by a wall message to be sent to all
16       logged-in users before going down.
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18       The time string may either be in the format "hh:mm" for hour/minutes
19       specifying the time to execute the shutdown at, specified in 24h clock
20       format. Alternatively it may be in the syntax "+m" referring to the
21       specified number of minutes m from now.  "now" is an alias for "+0",
22       i.e. for triggering an immediate shutdown. If no time argument is
23       specified, "+1" is implied.
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25       Note that to specify a wall message you must specify a time argument,
26       too.
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28       If the time argument is used, 5 minutes before the system goes down the
29       /run/nologin file is created to ensure that further logins shall not be
30       allowed.
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OPTIONS

33       The following options are understood:
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35       --help
36           Print a short help text and exit.
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38       -H, --halt
39           Halt the machine.
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41       -P, --poweroff
42           Power-off the machine (the default).
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44       -r, --reboot
45           Reboot the machine.
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47       -h
48           Equivalent to --poweroff, unless --halt is specified.
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50       -k
51           Do not halt, power-off, reboot, just write wall message.
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53       --no-wall
54           Do not send wall message before halt, power-off, reboot.
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56       -c
57           Cancel a pending shutdown. This may be used to cancel the effect of
58           an invocation of shutdown with a time argument that is not "+0" or
59           "now".
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EXIT STATUS

62       On success, 0 is returned, a non-zero failure code otherwise.
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SEE ALSO

65       systemd(1), systemctl(1), halt(8), wall(1)
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69systemd 246                                                        SHUTDOWN(8)
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