• Remove an image:
    $ vboxmanage controlvm 'Name' poweroff
    $ vboxmanage unregistervm 'Name' --delete
  • Register an image based on an oav disk:
    $ vboxmanage import FooBar.ova 
  • Start it and take a first snapshot:
    $ vboxmanage startvm 'Name' -type headless 
    $ vboxmanage snapshot 'Name' take Default