Mac Find v1.0

#!/bin/bash

####----All these commands were tested on kali linux 2.0 debian jessie----######

clear
printf "\nWelcome the MAC_FIND v1.0\n "
printf "\n\nplease set the MAC Address:\n"
printf "\n----> "
read a3030b;
clear
GET www.coffer.com/mac_find/?string=$a3030b > macaddress.txt;
c3030d="$(cat macaddress.txt | grep "table2" | tac | head -n1 | cut -d">" -f3 | cut -d"," -f1)"
if [ "$c3030d" == "" ]; then
clear
echo "----------------------------------------"
printf "\n\t--=[ MAC_ADDRESS ]=--\n\t\b\b--=[$a3030b]=--\n\n\t\t\b\b\b! UNKNOWN !\n"
echo "----------------------------------------"
printf "\n\n"
rm -rf macaddress.txt
exit;
else
echo "---------------------------------------"
printf "\n\t--=[ MAC_ADDRESS ]=--\n\t\b\b--=[$a3030b]=--\n\n\t$c3030d\n"
echo "--------------------------------------"
rm -rf macaddress.txt
fi
exit