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Read system files [closed]

From: Norway View: 3672 OKIS 

Question

So, i had to read system files at linux (hostname and other) and get interesting result. I tried read file as ordinary user and i get encrypt result, if i read file as super user i get normal result.

I understand, that this is security, but where i can more find information about this security of Linux OS? Official sourse desirable. Thank you for answer. I use ubuntu 18.04 x64.

Also, please, attachment more information about security of OS Linux (feature). Info desirable for developer. I write code by nasm assembly.

Best answer