The registervm command allows you
to import a virtual machine definition in an XML file into VirtualBox.
There are some restrictions here: the machine must not conflict with one
already registered in VirtualBox and it may not have any hard or removable
disks attached. It is advisable to place the definition file in the
machines folder before registering it.
When creating a new virtual machine with
VBoxManage createvm (see below), you
can directly specify the -register
option to avoid having to register it separately.
The unregistervm command
unregisters a virtual machine. If -delete
is also specified then the XML definition file will be deleted.