From the link: "systemd-notify may be called by daemon scripts to notify the init system about status changes. It can be used to send arbitrary information, enc

From the link: "systemd-notify may be called by daemon scripts to notify the init system about status changes. It can be used to send arbitrary information, encoded in an environment-block-like list of strings. Most importantly, it can be used for start-up completion notification." Perfect. Thank you!