Cannot be used with -u . This option does not require superuser privileges. Must be used with the -H option. List device file names in the output. If a field does not exist, consecutive colons hold the field's position.
Examples are disk , printer , and tape .
The instance number associated with the device or card. It is a unique number assigned to a card or device within a class. A numerical string of hardware components, notated sequentially from the bus address to the device address. Each number represents the location of a hardware component on the path to the device. The result of software binding.