Systemd doesn't recognize anymore the Simple service type.
Furthermore, it requires an absolute path to invoke software.
Eglide
$ systemctl status odderon.service ● odderon.service - Odderon darkbot Loaded: error (Reason: Exec format error) Active: active (running) since Fri 2017-06-09 21:01:54 UTC; 3 months 5 days ago Main PID: 6475 (darkbot) CGroup: /system.slice/odderon.service └─6475 /opt/odderon/bin/darkbot Sep 14 15:39:39 eglide.org systemd[1]: /etc/systemd/system/odderon.service:22: Failed to parse service type, ignoring: Simple Sep 14 15:39:39 eglide.org systemd[1]: /etc/systemd/system/odderon.service:25: Executable path is not absolute: kill -HUP `cat /opt/odderon/darkbot.pid`