Comment by jmclnx

FreeBSD jails years ago based upon a user request.

>hosting provider's ... desire to establish a clean, clear-cut separation between their own services and those of their customers

https://en.wikipedia.org/wiki/FreeBSD_jail

My guess Linux started getting requests rom various orgs for a while, so in true Linux fashion, we got a a few different container type methods years later.

I still think Jails are the best of the bunch, but they can be a bit hard to setup. Once setup, Jails works great.

So here we are :)