:~$ lsusb
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0461:4e22 Primax Electronics, Ltd 
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 05c8:0361 Cheng Uei Precision Industry Co., Ltd (Foxlink) SunplusIT INC. HP Truevision HD Webcam
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub