REBOOT(8) | System Manager's Manual | REBOOT(8) |
halt
, reboot
— stopping and restarting the system
halt |
[-lNnq ] |
reboot |
[-lNnq ] |
The halt
and
reboot
utilities flush the file system cache to
disk, send all running processes a SIGTERM
(and
subsequently a SIGKILL
) and, respectively, halt or
restart the system. The action is logged, including entering a shutdown
record into the user accounting database.
When the system is halted with the halt command, the system is powered off.
The options are as follows:
-l
halt
or reboot
and log
this themselves.-N
-n
-q
-n
option is not specified). This option should
probably not be used.Normally, the shutdown(8) utility is used when the system needs to be halted or restarted, giving users advance warning of their impending doom and cleanly terminating specific programs.
The SIGKILL
will follow the
SIGTERM
by an intentionally indeterminate period of
time. Programs are expected to take only enough time to flush all dirty data
and exit. Developers are encouraged to file a bug with the OS vendor, should
they encounter an issue with this functionality.
A reboot
utility appeared in
4.0BSD.
June 6, 2023 | macOS 14.6 |