NAME
reboot — reboot the system
SYNOPSIS
/usr/sbin/reboot
[-h|-r]
[-n|-s]
[-q]
[-t
time]
[-m
message]
/usr/sbin/reboot
-R
[-H]
[-n|-s]
[-q]
[-t
time]
[-m
message]
DESCRIPTION
The
reboot
command terminates all currently executing processes
except those essential to the system,
then reboots the system, or halts,
or makes the partition ready for reconfiguration.
When invoked without arguments,
reboot
syncs all disks before rebooting the system.
Options
The
reboot
command recognizes the following options:
- -h
Shut down the system and halt.
- -r
Shut down the system and reboot automatically (default).
- -R
Shut down the system to a ready-to-reconfigure state and reboot if possible.
If the partition is unable to reboot,
it will stop at a ready-to-reconfigure state.
However, if the
-H
option is also specified, the system will always stop at ready-to-reconfigure
state.
This option is available only on systems that support hardware
partitions.
- -H
Shut down the system to a ready-to-reconfigure state and do not reboot.
This option can be used only in combination with the
-R
option.
This option is available only on systems that support hardware
partitions.
- -n
Do not sync the file systems before shutdown.
- -s
Sync the file systems before shutdown;
for file systems that were cleanly mounted, modify the
fs_clean
flag from
FS_OK
to
FS_CLEAN
(default).
- -q
Quick and quiet.
Suppress broadcast of warning messages,
terminate processes by brute force (with
SIGKILL)
and immediately call
reboot
with arguments as indicated by the other options (see
reboot(2)).
No logging is performed.
The
-t
and
-m
options are ignored with this option.
- -t time
Specify what time
reboot
will bring the system down.
time
can be the word
now
(indicating immediate shutdown) or a future time in one of two formats:
+number
and
hour:min.
The first form brings the system down in
number
minutes; the second brings the system down
at the time of day indicated (based on a 24-hour clock).
- -m message
Display
message
at the terminals of all users on the system at decreasing intervals as
reboot
time
approaches.
The
message
must not contain any embedded double quotes.
At shutdown time a message is written in the file
(if it exists), containing the time of shutdown, who ran
reboot,
and the reason.
Only users with appropriate privileges can execute the
reboot
command.
WARNINGS
reboot
does not invoke the shutdown scripts associated with subsystems to
bring them down in a cautious manner.
See
shutdown(1M).
If the
-R
option is used in a virtual partition environment on a partitionable system,
then the requested reconfiguration will not take place until all the virtual
partitions on that hard partition are shut down and the virtual partition
monitor is rebooted.
AUTHOR
reboot
was developed by HP and the University of California, Berkeley.
FILES
- /etc/shutdownlog
Shutdown log
Printable version
