I'm using Ubuntu 12.04.I need to send a command to a device that I have connected on a port of my PC.I can send the command by finding out what the Bus and Device number are.For example, lsusb will tell me that I have a device connected on Bus 007 and Device 003Bus 007 Device 003: ID 045e:00cb Google Inc.However, the device number will change if I reboot the device.Bus 007 Device 004: ID 045e:00cb Google Inc.Is there a way to make sure that I can send the commands to that PC USB port? By associating the device number to that phyical USB port? Or is there other fixes and workarounds? 
How to associate physical usb port with usb device number
linux;ubuntu;usb;devices