How to Implement a Daemon Process in Go

Go does not have a built-in daemon mode; you must detach the process from the terminal using os.StartProcess or a wrapper like systemd.

package main

import (
	"os"
	"os/exec"
)

func main() {
	cmd := exec.Command(os.Args[0], "--detached")
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	cmd.Start()
	os.Exit(0)
}

Run the binary with nohup ./your-binary & or configure it as a systemd service for production use.

A daemon is a background program that runs without a user interface. In Go, you achieve this by starting the program in the background and detaching it from the terminal so it keeps running after you log out. Think of it like starting a fan and walking away; the fan keeps spinning even though you aren't holding the switch.