I am moving from FreeBSD/Freenas to Debian/Freenas Scale eventually, but the question is broader. What would be the equivalent for jails on Linux osses.
Now most will recommend docker or some variant of that. I would agree but I really REALLY like how jails work how I can go to the shell and change/install what I need. The Problem is (AFAIK) it's not possible to tread a docker like a jail, so it would have to be build pre-configured etc. It's not for me.
Then the next option is VM this would work I suppose, but it feels overcomplicate to create vm for every app besides won't it waste recourses ?.
So I am looking for recommendations what to replace my current jails with to keep as much functionality as they have now.