Shell script to read an IP address from user's input and check if the input IP address is valid or not.

Fill in the Blank to complete the task!

#!/bin/bash echo -n "Please enter the ip:" _______A._______ echo $ip|grep _______B.______________ if [_______C._______] then echo "Please enter IP address following the IP address pattern" exit fi #replace the dots in ip with spaces ip=`echo $ip | sed _______D._______ valid=1 n=1 for num in $ip do if [ _______E._______ ] then echo "INVALID: Please enter a number between 0-255 in field $n (index starts from 1 from left)" valid=0 exit fi n=`expr $n + 1` done if [ $valid -eq 1 ];then echo "The ip you entered is valid"

fi