VBoxManager很强大哈！

http://www.virtualbox.org/manual/ch08.html

As briefly mentioned in the section called “Alternative front-ends”, VBoxManage is the command-line interface to VirtualBox. With it, you can completely control VirtualBox from the command line of your host operating system. VBoxManage supports all the features that the graphical user interface gives you access to, but it supports a lot more than that. It exposes really all the features of the virtualization engine, even those that cannot (yet) be accessed from the GUI.

You will need to use the command line if you want to

• use a different user interface than the main GUI (for example, VBoxSDL or the VBoxHeadless server);

• control some of the more advanced and experimental configuration settings for a VM.