#!/bin/bash

function valid_ip()
{
    local  ip=$1
    local  stat=1

    if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        OIFS=$IFS
        IFS='.'
        ip=($ip)
        IFS=$OIFS
        [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
            && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
        stat=$?
    fi
    return $stat
}





while [[ ($# > 0) ]]
do


        if valid_ip $1
                then
                        ping -c 1 $1 > /dev/null
                        if [ $? != 0 ]
                                then
                                        echo "Connection not established"
                                else

                                        ssh $1 ">/dev/null pgrep apache2"
                                        if [ $? == 0 ]
                                                then
                                                         echo "Apache process on $1 is up and running"

                                                else
                                                         echo "Apache process on $1 stopped"
                                        fi

                        fi
                                                shift

                                                else
                                                        echo "$1 is an inncorrect ip address"
                                                        shift

        fi

done