shutdown(8) on macOS
The text 81b562dcb00f, as Mac OS X 10.4.11.x86, Mac OS X 10.4.10.x86, Mac OS X 10.4.9.x86, Mac OS X 10.4.8.x86 shipped it.
close down the system at a given time
Flags it lists
-
- -
-h -
-k -
-n -
-o -
-r -
-u