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Raspberry Pi 3 - Starting a Java JAR on Boot using systemd
Jessie has moved away from sysvinit and onto systemd. Writing an init script to /etc/init.d/ is outdated,
and a bit tedious since you have to handle the start/stop/restart logic yourself (if you want those capabilities).
New Method:
1. Write a unit file for systemd.
$ sudo nano /etc/systemd/system/your_jar_software.service
Description=Example on starting a JAR with systemd
ExecStart=/usr/bin/java -jar /home/pi/path/to/your/JAR.jar
2. Start it at boot
$ sudo systemctl enable your_jar_software
3. Manually control it
$ sudo systemctl start|stop|status|restart your_jar_software
4. Observe the output
$ sudo journalctl -u your_jar_software
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