lsusb

root@beagleboard:~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 1a40:0101 TERMINUS TECHNOLOGY INC.
Bus 001 Device 003: ID 0fe6:8101
Bus 001 Device 004: ID 413c:2106 Dell Computer Corp.
Bus 001 Device 006: ID 0461:4d15 Primax Electronics, Ltd Dell Optical Mouse
root@beagleboard:~#