#!/bin/bash

# host to ping
# there - default gw
HOST=<default_gw_ip>
# -q quiet
# -c nb of pings to perform
ping -c 1 -W 1 $HOST > /dev/null

# $? var keeping result of execution
# previous command
if [ $? -eq 0 ]
    then
        echo `date +"%T %F"` "OK gw reachable" 
        EXIT_CODE=0
    else
        echo `date +"%T %F"` "ERROR gw unreacheble!" 
        EXIT_CODE=1
fi

exit $EXIT_CODE