Schedules and logs

Read the output

What explains this output?

$ systemctl show lab-demo.service -p Result
Result=success
$ sudo journalctl -u lab-demo.service -p err --no-pager
Oct 18 17:43:38 ubuntu lab-demo[1116]: settings-missing
Oct 18 17:43:38 ubuntu systemd[1]: Failed to start lab-demo.service - Linux Labs journal demo.

• A The service is broken, and Result has not updated yet.
• B The last run succeeded, and the error stayed in the journal from an earlier one.
• C The journal must be cleared, or the service counts as broken.