What USB port am I connected to?

[Derek Broughton]

John Dangler wrote:

> On Fri, 2007-11-02 at 00:05 -0400, Alex Janssen wrote:
>> I want to communicate with a serial device over the USB that is not a
>> recognized device.  It is a PLC(programmable logic controller). How do
>> I
>> tell which USB device file to open?  i.e.; /dev/bus/usb/002/001 or
>> 002... .  Is there a way to tell what I'm plugged into?  Is there a
>> USB
>> howto for programmers?
> 
> 2 ways that I know of....
> plug in the device
> go to a terminal, type dmesg and look at the last output...
> OR
> lsusb should also give you some indication

lshal, and the various gui hal viewers, will give much more information
about the actual /dev name.  lsusb will only tell you which _bus_ it's on
(in the example /dev/bus/usb/002) but not the device number, because that
autoincrements every time something's plugged in.
-- 
derek