[Solved] Need ubuntu 18.04 systemd "script"

I live on a Mac but I have JDownloader running on an ODroid which is running Ubuntu 18.04. Right now I have a script (cleverly called Run) that I can kick off via the shell and it starts a headless JDownloader. The small angst is with each reboot, I need to log in and start it up.

Has anyone produced a systemd file to do this? I don't know jack about systemd and I'm not sure I want to learn.

Thank you

[Jiaz]

for example
/etc/systemd/system/jdownloader2.service

[Unit]
Description=JDownloader2 Headless
After=network.target

[Service]
Type=oneshot
ExecStart=/usr/bin/java -Djava.awt.headless=true -jar /path/JDownloader.jar
PIDFile=/path/JDownloader.pid
RemainAfterExit=yes
User=jdUser
Group=jdGroup

[Install]
WantedBy=multi-user.target

replace jdUser/jdGroup matching to /path
replace /path with JDownloader path

Thanks!

When I did `systemctl start jdownloader2` it did not return to the prompt. So I stopped it and changed `Type` to `simple`

[Jiaz]

Thanks for the feedback. oneshot should also work when you place & at the end of ExecStart