I have no experience using Ubuntu before
I'm doing a point of sale project for a restaurant which will run in local Lan (offline not online). I will setup one mini PC as an Ubuntu web server. and my client will access into it via local lan via http request. The server will be placed inside the restaurant.
Is it possible to protect from someone who wants to steal my file or clone the entire disk and use it with another restaurant?
Or Ubuntu already has some mechanism inside to protect someone from doing this, e.g. password require before transfer file out of the computer? or password needed before clone the disk?
I know nothing about Ubuntu, can you please tell me the easiest way to protect my project from being stolen?