Copy virtual machines in VirtualBox

Copy virtual machines in VirtualBox
A simple copy of a virtual machine does not work. The copy process requires a small trick. The copied VDI file cannot be registered in the virtual Media Manager, because each VDI file has a unique uuid, virtualBox does not allow registration of duplicate uuid. To build a hadoop platform, you need to install another virtual machine, but you have already installed it once. You don't want to install it again. What should you do? Use the following method:
After the VM is created, select the existing virtual hard disk file when creating the VM: