Remotely shutdown Virtualbox

There are times when you need to remotely shutdown any running virtual machines on a linux-box. This is how to do it.

1. Ssh to the host:
   # ssh sorin@lanfear
   
   
2. Su to user running the vm:
   # su -
   
   
3. List all vms:
   # vboxmanage list vms
   
   vm1
   vm2
   ...
   
   
4. Shutdown vm1:
   # vboxmanage controlvm "vm1" poweroff
   
   
5. Start vm2:
   # vboxmanage startvm "vm2" --type gui
   
   # vboxmanage startvm "vm2" --type headless