UNIX / Linux Shell Script For Monitoring System network with ping command

#!/bin/bash


# Simple SHELL script for Linux and UNIX system monitoring with 


# ping command


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# Copyright (c) 2006 nixCraft project <http://www.cyberciti.biz/fb/>


# This script is licensed under GNU GPL version 2.0 or above


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# This script is part of nixCraft shell script collection (NSSC)


# Visit http://bash.cyberciti.biz/ for more information.


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# Setup email ID below


# See URL for more info:


# http://www.cyberciti.biz/tips/simple-linux-and-unix-system-monitoring-with-ping-command-and-scripts.html


# -------------------------------------------------------------------------


 


# add ip / hostname separated by white space 


HOSTS="cyberciti.biz theos.in router"


 


# no ping request


COUNT=1


 


# email report when 


SUBJECT="Ping failed"


EMAILID="me@mydomain.com"


for myHost in $HOSTS


do


  count=$(ping -c $COUNT $myHost | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')


  if [ $count -eq 0 ]; then


    # 100% failed 


    echo "Host : $myHost is down (ping failed) at $(date)" | mail -s "$SUBJECT" $EMAILID


  fi


done