The following options are understood:
Print a short help text and exit.
Halt the machine, regardless of which one of the three commands
Power-off the machine, regardless of which one of the three
commands is invoked.
Reboot the machine, regardless of which one of the three commands
Force immediate halt, power-off, reboot. Do not contact the init
Only write wtmp shutdown entry, do not actually halt, power-off,
Do not write wtmp shutdown entry.
Don't sync hard disks/storage media before halt, power-off,
Do not send wall message before halt, power-off, reboot.
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2016-08-07. If you dis‐
cover any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
systemd 231 HALT(8)