sshanalog

#!/bin/bash

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
	echo $stat
}

command sshpass >/dev/null 2>&1
if [ "$?" -ne "0" ] ; then
	echo sorry, your distribution needs to have 'sshpass' installed
	echo try \'sudo apt-get install sshpass\' OR \'sudo yum install sshpass\'
	exit
fi

if [ $(valid_ip ${1}) -eq "1" ] ; then
	echo "$0 : invalid IP number, CTRL-C to break DNS lookup"
fi

sshpass -panalog \
	ssh -oStrictHostKeyChecking=no \
		-oUserKnownHostsFile=/dev/null \
		-oCheckHostIP=no root@${1}