This is the output:
grampy@grampy-GC662AA-ABA-SR5113WM:~$ Isusb
bash: Isusb: command not found
grampy@grampy-GC662AA-ABA-SR5113WM:~$ 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 001 Device 003: ID 0bda:0111 Realtek Semiconductor Corp. RTS5111 Card
Reader Controller
Bus 002 Device 002: ID 04ca:0020 Lite-On Technology Corp.
Bus 002 Device 003: ID 05ac:0304 Apple, Inc. Optical USB Mouse [Mitsumi]
grampy@grampy-GC662AA-ABA-SR5113WM:~$
