Sun Microsystems VIRTUALBOX VERSION 3.1.0_BETA2 - Manual (Page 122)

8 VBoxManage reference
• nic<1-N> null|nat|bridged|intnet|hostonly: With this, you can set,
for each of the VM’s virtual network cards, what type of networking should be
available. They can be not connected to the host (null), use network address
translation (nat), bridged networking (bridged) or communicate with other
virtual machines using internal networking (intnet) or host-only networking
(hostonly). These options correspond to the modes which are described in
detail in chapter
6.2 , Introduction to networking modes , page 89 .
• usbattach and usbdettach make host USB devices visible to the virtual ma-
chine on the fly, without the need for creating filters first. The USB devices can
be specified by UUID (unique identifier) or by address on the host system.
You can use VBoxManage list usbhost to locate this information.
• vrdp on|off lets you enable or disable the built-in VRDP server.
• vrdpport default| changes the port or a range of ports that the
VRDP server can bind to; “default” or “0” means port 3389, the standard port
for RDP. For details, see the description for the --vrdpport option in chapter
8.5.3 , Serial port, audio, clipboard, VRDP and USB settings , page 117 .
• setvideomodehint requests that the guest system change to a particular video
mode. This requires that the guest additions be installed, and will not work for
all guest systems.
• The setcredentials operation is used for remote logons in Windows guests.
For details, please refer to chapter 9.2 , Automated Windows guest logons , page
137 .
8.10 VBoxManage discardstate
This command discards the saved state of a virtual machine which is not currently
running, which will cause its operating system to restart next time you start it. This
is the equivalent of pulling out the power cable on a physical machine, and should be
avoided if possible.
8.11 VBoxManage snapshot
This command is used to control snapshots from the command line. A snapshot con-
sists of a complete copy of the virtual machine settings, copied at the time when the
snapshot was taken, and optionally a virtual machine saved state file if the snapshot
was taken while the machine was running. After a snapshot has been taken, VirtualBox
creates differencing hard disk for each normal hard disk associated with the machine
so that when a snapshot is restored, the contents of the virtual machine’s virtual hard
disks can be quickly reset by simply dropping the pre-existing differencing files.
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