export a VirtualBox appliance from command line

This trick might be useful, I did an Ubuntu update and it did not works for my system, so I'm rescuing many things, one of them are Virtual Machines from VirtualBox, so from command line the steps are:

1. vboxmanage list vms
  You will get the list of all your Vm's

2.  vboxmanage export -o .ova
Export the appliance to a single file, I tried this directly to an removable USB Hard Drive and it worked

3. Go to the target system and use this command:
    vboxmanage import .ova  or use the VirtualBox's graphical interface to import it

and that's it, the import process may delay, it depends of the size of the appliance.

Cheers