aaron@aaron-Inspiron-1090:~$ ls usb
ls: cannot access usb: No such file or directory
aaron@aaron-Inspiron-1090:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 009: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
Bus 001 Device 002: ID 0bda:58f4 Realtek Semiconductor Corp. 
Bus 004 Device 002: ID 0eef:725e D-WAV Scientific Co., Ltd 
aaron@aaron-Inspiron-1090:~$