rebooting from the commandline?

My use of a QNX box will be 99.999% remote, so all my system management will be done through an ssh or telnet shell from about 500 miles away.

One of the things I need to do is remotely reboot, or at least gracefully shut down the system from my remote location in the event the box needs to be physically moved (which is always done by a strict-windows user with just enough fear/uncertain/doubt to be unwilling to even attempt a log in to a non-windows system).

I looked around for a “halt”, a “reboot” and a “boot” command, but didn’t find anything. Does such a command exist?

Many thanks