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
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To deny users permission to use USB storage, it should suffice to remove them from the group plugdev.