I have Ubuntu 10.04 based portable touchscreen computers at workplace and sometimes people would use USB data cable to charge their phones from the USB port.

Now I have usb storage access disabled ($sudo leafpad /etc/modprobe.d/blacklist.conf and entering blacklist usb\_storage at the very end) but now we have a requirement to stop this USB-Phone-Charging also.

Any solutions to this bizarre requirement i.e. to power OFF usb ports completely ???

The same I posted on unix - exchange but did not get any favorable solutions other than using a stick of glue to shut off the port or to de-solder USB terminal from motherboard.

Kindly give me some ideas to achieve my target without creating an absolute mess out of the piece of hardware.

**EDIT**

Before testing on the actual touchscreen computers (ubuntu 10.04), I did some work on my laptop (ubuntu 12.04). It has 3 USB ports, I HAVE SUCCESSFULLY DISABLED ONE PORT USING;

```
echo '2-1' |sudo tee /sys/bus/usb/drivers/usb/unbind

```

so IT IS POSSIBLE TO TURN OFF USB. My kernel version -- 3.13.0-32-generic

Now I am looking how to disable the rest TWO.