how do I hard reboot jetson tk1

New and am unsure how to do a hard reboot. Is it pressing power twice?

Saw this in your other thread, try to keep in one thread (questions are usually answered, but people need time to see it…having it in more than one thread won’t speed it up). Holding the power button down will hard reboot (just turning off Jetson). The reset button will also do this (restarting after shutdown).