Open up a terminal session, and switch to your non-root user (not apparent from logs). Type in these commands, swapping out the values according to what you see on your own output.
$ cd /usr/games/minecraft
$ chmod +x ./mineos_console.js
$ ./mineos_console.js -s Yay get_start_args
[Yay] Successfully executed "get_start_args"
[ '-dmS',
'mc-Yay',
'/usr/bin/java',
'-server',
'-jar',
'minecraft_server.1.15.jar',
'nogui' ]
$ cd /var/games/minecraft/servers/Yay
$ /usr/bin/java -server -jar minecraft_server.1.15.jar nogui
What this is doing is:
- establishing the exact startup command being executed by the webui
- going into your server directory as the non-root user
- running the exact startup command, and giving you direct access to the screen output
You may have more arguments in your output vs. mine, so do your best to keep them all in, except the first two arguments, which are only useful for screen invocations (you don’t want this, because you’re troubleshooting).
Also you can just run /usr/bin/java (or whatever yours says)–this is where I suspect the issue is: because you’ve installed a new Java, and nothing starts, I am inclined to think that whatever Java you installed is not in your $PATH environment.