It seemed like the service was trying to start, but it just never finished. The guide says it could take up to 15 minutes, but I am sure I waited for an hour. Then I decided to restart the machine, and if I check the status of the service with the status command, it says Loaded, but inactive. If I try to start the service it fails.
Running the journalctl command, I get a line that says “Java 1.8 or higher required, aborting launch”. So it seems my installed Java version does not work?
Ok, next update. I installed Zulu 8. Now I have both 8 and 9 installed. I then found this command:
sudo update-alternatives --config java
This allowed me to change to version 8. Now Openhab starts, so this solved the problem. Thanks a lot. But, how do I change so that version 8 will start in auto? Because now it says 9 is auto and 8 is manual. I suspect if I reboot the machine, it will start with version 9 again.
Just follow this guide first unsinstalling and after that installing the right version. Ofcourse theres possibilty to have both versions installed. You can switch between them. You can find these instructions allso in the pdf.