Thanks for response!
Well not every app is in flatpak. Like steam gives you a .deb to download and not a flatpak. Only for this reason I said “dont say about flatpak”. I would definetly use flatpak where ever possible. I was simply asking for help in linux permsions and users in case I cant run app in flatpak. It isn’t a vague desire for “plain old linux” but instead a desire for when flatpaks arent possible, I need to do the same for it with plain linux.
But now I understand that these tools I mentioned arent really plain linux like I thought. I should have asked the question properly Also I didnt know firejail was like flatpak though.
So I now understand what to ask exactly.
I want to learn underlying tools which apps like flatpak and firejail use. Mainly the user permssions and filesystem permissions. Dont want to learn the application themseleves but want to do myself what these applications do in behind the scenes.
Thanks for the sources though!
Openness of linux would be lost
Although device drivers are proprietary, linux does its best to limit such proprietry stuff. But in case of android, Google pretty much has a monopoly because a standard build of android isnt enough for use.
I hate that the spirit of openness is shot on the foot just because of the need of commercialization. I would prefer linux than android.