look the results.
volumio@zerling:~$ sudo systemctl start minidlna.service
Failed to start minidlna.service: Unit minidlna.service failed to load: Invalid argument. See system logs and ‘systemctl status minidlna.service’ for details.
volumio@zerling:~$ systemctl status -l minidlna.service
● minidlna.service - MiniDLNA UPnP-A/V and DLNA media server
Loaded: error (Reason: Invalid argument)
Active: inactive (dead)
Aug 25 21:05:36 zerling systemd[1]: [/etc/systemd/system/minidlna.service:8] Executable path is not absolute, ignoring: $minidlnad -P /var/run/minidlna/minidlnad.pid -f /data/minidlna.conf
Aug 25 21:05:36 zerling systemd[1]: minidlna.service lacks both ExecStart= and ExecStop= setting. Refusing.
Aug 25 21:05:36 zerling systemd[1]: [/etc/systemd/system/minidlna.service:8] Executable path is not absolute, ignoring: $minidlnad -P /var/run/minidlna/minidlnad.pid -f /data/minidlna.conf
Aug 25 21:05:36 zerling systemd[1]: minidlna.service lacks both ExecStart= and ExecStop= setting. Refusing.
Aug 25 21:05:36 zerling systemd[1]: [/etc/systemd/system/minidlna.service:8] Executable path is not absolute, ignoring: $minidlnad -P /var/run/minidlna/minidlnad.pid -f /data/minidlna.conf
Aug 25 21:05:36 zerling systemd[1]: minidlna.service lacks both ExecStart= and ExecStop= setting. Refusing.
Aug 25 21:17:29 zerling systemd[1]: [/etc/systemd/system/minidlna.service:8] Executable path is not absolute, ignoring: $minidlnad -P /var/run/minidlna/minidlnad.pid -f /data/minidlna.conf
Aug 25 21:17:29 zerling systemd[1]: minidlna.service lacks both ExecStart= and ExecStop= setting. Refusing.
Aug 25 21:18:44 zerling systemd[1]: [/etc/systemd/system/minidlna.service:8] Executable path is not absolute, ignoring: $minidlnad -P /var/run/minidlna/minidlnad.pid -f /data/minidlna.conf
Aug 25 21:18:44 zerling systemd[1]: minidlna.service lacks both ExecStart= and ExecStop= setting. Refusing.
volumio@zerling:~$
volumio@zerling:~$ sudo systemctl start minidlna.service
volumio@zerling:~$ volumio@zerling:~$ sudo systemctl start minidlna.service
Active: inactive (dead)