On Fri, Apr 25, 2008 at 04:51:40PM +1000, Daniel Dalton wrote: > So if I have a hub and say an external hard drive pluged in will it be 0? Yes. /dev/ttyUSB0 is its name as a serial port, not as a USB device. If you had more than one serial to USB converter, they would be /dev/ttyUSB0 /dev/ttyUSB1 etc.