If possible, attempt to stop the system by using one of the following commands:
If the system is running, become superuser and issue the init 0 to stop the system. Press any key to reboot the system after the Type any key to reboot prompt appears.
If the system is running, become superuser and issue the init 6 to reboot the system.
If the system doesn't respond to any input from the mouse or keyboard, press the reset key, if it exists, to reboot the system. Or, use the power (on/off) switch to reboot the system.