8VBoxManage reference
•--hostonlyadapter<1-N> none<devicename>: If host-only networking has been enabled for a virtual network card (see the –nic option above; otherwise this setting has no effect), use this option to specify which host-only networking interface the given virtual network interface will use. For details, please see chapter 6.6, Host-only networking, page 94.
•--intnet<1-N> network: If internal networking has been enabled for a vir- tual network card (see the --nic option above; otherwise this setting has no effect), use this option to specify the name of the internal network (see chapter 6.5, Internal networking, page 93).
•--macaddress<1-N> auto<mac>: With this option you can set the MAC address of the virtual network card. Normally, each virtual network card is as- signed a random address by VirtualBox at VM creation.
8.5.3 Serial port, audio, clipboard, VRDP and USB settings
The following other settings are available through VBoxManage modifyvm:
•--uart<1-N> off<I/O base> <IRQ>: With this option you can configure virtual serial ports for the VM; see chapter 3.9, Serial ports, page 55 for an intro- duction.
•--uartmode<1-N> <arg>: This setting controls how VirtualBox connects a given virtual serial port (previously configured with the --uartX setting, see above) to the host on which the virtual machine is running. As described in detail in chapter 3.9, Serial ports, page 55, for each such port, you can specify <arg> as one of the following options:
–disconnected: Even though the serial port is shown to the guest, it has no “other end” – like a real COM port without a cable.
–server <pipename>: On a Windows host, this tells VirtualBox to create a named pipe on the host named <pipename> and connect the virtual serial device to it. Note that Windows requires that the name of a named pipe begin with \\.\pipe\.
On a Linux host, instead of a named pipe, a local domain socket is used.
–client <pipename>: This operates just like server ..., except that the pipe (or local domain socket) is not created by VirtualBox, but assumed to exist already.
–<devicename>: If, instead of the above, the device name of a physical hardware serial port of the host is specified, the virtual serial port is con- nected to that hardware port. On a Windows host, the device name will be a COM port such as COM1; on a Linux host, the device name will look like /dev/ttyS0. This allows you to “wire” a real serial port to a virtual machine.
