How to configure ubuntu to mount usb devices in RO mode?

Question

System administration

Good afternoon! there is os ubuntu-14.04.3-desktop. the authorities set the task for usb flash drives and hard drives to be mounted in RO mode. I tried sudo chmod -R 754 /media, but when logging in as a different user, it is not possible to open the device. I know that the problem is as old as the world, but even I did not find a solution. Please tell me how to implement. Thank you.

Answer 1

What daemon is responsible for automounting the flash drive? Here in its settings and look