Golang execute system shell command

command.go

package main

import (
	"fmt"
	"os/exec"
	"strings"
)

func hello() string {
	cmd := "echo hello"
	out, err := exec.Command("sh", "-c", cmd).Output()
	if err != nil {
		return ""
	}

	return strings.TrimSpace(string(out))
}

func main() {
	fmt.Println(hello())
}