wer@wer-desktop:~$ halt --help
Использование: halt [ОПЦИЯ]...
Останов системы.
Опции:
-n, --no-sync don't sync before reboot or halt
-f, --force force reboot or halt, don't call shutdown(

-p, --poweroff switch off the power when called as halt
-w, --wtmp-only don't actually reboot or halt, just write wtmp
record
-q, --quiet reduce output to errors only
-v, --verbose increase output to include informational messages
--help display this help and exit
--version output version information and exit
This command is intended to instruct the kernel to reboot or halt the system;
when run without the -f option, or when in a system runlevel other than 0 or 6,
it will actually execute /sbin/shutdown.