WARNING: Deleting ALL VMS IN THE SYSTEM
IDsVMs=($(VBoxManage list vms | awk -F '[{}]' '{print $2}'))
for idvm in "${IDsVMs[@]}";
do
echo "Powering off VM: ${idvm}..."
VBoxManage controlvm "${idvm}" poweroff
echo "Deleting VM ${idvm}..."
VBoxManage unregistervm ${idvm} --delete
done