Someone

#!/bin/bash


oldIPList='192.168.0.1 192.168.0.2 192.168.0.3 192.168.0.4 192.168.0.5'

newIPList='192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4 192.168.1.5'




for oldip in $oldIPList && newip in $newIPList
do
echo "$oldip $newip"
done