#!/bin/bash
multipath_conf=/etc/multipath.conf
overrides_conf="no_path_retry 50"
if ! grep -q "no_path_retry fail" -e "(no_path_retry\s\d+)"  "$multipath_conf"; then
  printf "%s\n" " " "overrides {" "        $overrides_conf" "}" >> $multipath_conf
fi
~