Well, just as in the linked page, this is how we would systematically find out what’s causing the problem: Problem loggin in on CentOS 7
The script itself tests 3 separate authentication methods, individually. If any of the three pass, the auth of MineOS will work by choosing that method.
Here’s a quick link to the script itself: https://pastebin.com/EaTLwkmv
The only requirement to this script is changing the first few lines to match a valid, existing non-root user. Currently it’s mc and password, but that can be changed to literally whatever login you’re using (and should be changed).
I think one of the core problems here is that all the CentOS related issues are docker builds or third-party images, as well, which mean there is config occurring AFTER the fresh install, which is what I’m testing.
If you guys can fill me in on what docker image file (or provide the build file to me)–or provide any way I can work on that type of system first-hand, I can use that and troubleshoot it more surgically!