When using systemd, you can find a full log of what happens in processes by reading the tail end of /var/log/daemon.log
I think we might need to take a step back, in this topic you have mixed multiple different ways of setting up openHAB and it is very unclear for me to see how you’re going about the setup task. You might want to consider reading about, and then using openHABian, which does the setup on a raspberry pi for you.