systemd-notify
linux
Notify the service manager about start-up completion and other daemon status changes. This command is useless outside systemd service scripts.
More info →Examples (3)
Notify systemd that the service has completed its initialization and is fully started. It should be invoked when the service is ready to accept incoming requests
systemd-notify --bootedSignal to systemd that the service is ready to handle incoming connections or perform its tasks
systemd-notify --readyProvide a custom status message to systemd (this information is shown by `systemctl status`)
systemd-notify --status "Add custom status message here..."made by @shridhargupta | data from tldr-pages