code: func Exec(cmd string, args ...string) error {
  	c := exec.Command(cmd, args...)
  	c.Stdin = os.Stdin
  	c.Stdout = os.Stdout
  	c.Stderr = os.Stderr
  
  	if err := c.Run(); err != nil {
  		return err
  	}
  	return nil
  }
docs: // Exec executes a command setting both standard input, output and error.