If you need your virtual machine to reboot immediately (after a crash for instance) you can simulate hitting the reset button by typing:
$ bigv vm restart matt1
matt1 was switched on.
This is exactly equivalent to typing vm stop followed by vm start or hitting the reset button on a PC, so the Operating System does not have a chance to clean up. If you want a clean reboot, you should tell your OS to do it (e.g. type "reboot" on a Linux system), though currently this will not allow the system to recognise new hardware (as a limitation of the (β) you will need to type "halt" instead, and the system will still reboot automatically).
The "switched on" message confirms the operation was successful.
