VBoxManage list vms
Result:
"Alpine Linux" {fa8e791f-9668-4d7b-a1a1-c5d93304bb9d}
"Ubuntu 20.04 blank" {e3c9cea6-b601-4a59-9d29-e755e54e1514}
VBoxManage startvm "Ubuntu 20.04 blank" --type=headless
Result:
Waiting for VM "Ubuntu 20.04 blank" to power on...
VM "Ubuntu 20.04 blank" has been successfully started.
VBoxManage controlvm "Ubuntu 20.04 blank" acpipowerbutton
VBoxManage controlvm "Ubuntu 20.04 blank" poweroff