I'm admin for one of my college PC with 3 other normal users . If possible I want to restrict other 3 normal users from using USB. I'm using Ubuntu 12.04 .
You can disable USB storage device in Ubuntu, where only root users can only enable it. Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.
When it opens add blacklist usb_storage as the last line, then with the command below open the rc.local file
When it opens, add modprobe -r usb_storage before the line exit 0
Now go ahead and reboot your system.
To mount, open a Terminal and use the following command.
To Unmount the USB device, just right click on the device in file manager, and choose safley remove, or Unmount device, and run
To deny users permission to use USB storage, it should suffice to remove them from the group plugdev.