Virtualbox CLI and .vbox(-prev) file

Run&Control Virtualbox VM From CLI

1,    type ' VBoxManage.exe list vms ', this command will list the exist/registed VMs
    for example,
        "Ubuntu" {279e8596-39d9-4163-a599-d0ef906d0b64}
        ...
    maybe you also want to kown the VM infos,pls type 'VBoxManage showvminfo <VM name>'
    for example,
        VBoxManage showvminfo "Ubuntu"
    you can also use 'VBoxManage modifyvm <VM name> (....some specified settings and args)'

2,    to START a VM, type ' VBoxManage startvm <VM name> [--type headless]