code: func Exec(execer exec.Interface, parameters ...string) error {
  	conntrackPath, err := execer.LookPath("conntrack")
  	if err != nil {
  		return fmt.Errorf("error looking for path of conntrack: %v", err)
  	}
  	output, err := execer.Command(conntrackPath, parameters...).CombinedOutput()
  	if err != nil {
  		return fmt.Errorf("conntrack command returned: %q, error message: %s", string(output), err)
  	}
  	return nil
  }
docs: // Exec executes the conntrack tool using the given parameters