1) install screen and java-jre-headless
1) create unpriviliged user+group "minecraft"
1) create folder /srv/minecraft <code>mkdir -p /srv/minecraft</code>
1) <code>chown minecraft.minecraft /srv/minecraft</code>
1) copy unit-file to /lib/systemd/system/minecraft.service
1) enable unit-file
1) copy update-minecraft.sh to /usr/local/bin
1) make updatescript executable
1) add updatescript to /etc/crontab: <code>0 3 * * * root bash /usr/local/bin/update-minecraft.sh</code>