user1@gemini:~$ sudo systemctl status ppp.service
● ppp.service - PPP wrapper
     Loaded: loaded (/etc/systemd/system/ppp.service; disabled; vendor preset: enabled)
     Active: failed (Result: signal) since Mon 2020-08-24 08:48:03 JST; 9h ago
TriggeredBy: ● ppp.path
    Process: 659 ExecStartPre=/usr/local/sbin/gen_pppconfig (code=killed, signal=TERM)

Aug 24 08:48:02 gemini systemd[1]: Starting PPP wrapper...
Aug 24 08:48:02 gemini gen_pppconfig[659]: Do not create PPP config files.
Aug 24 08:48:03 gemini systemd[1]: ppp.service: Control process exited, code=killed, status=15/TERM
Aug 24 08:48:03 gemini systemd[1]: ppp.service: Failed with result 'signal'.
Aug 24 08:48:03 gemini systemd[1]: Stopped PPP wrapper.