Linux Grep Searches

#!/bin/bash

mkdir -p /tmp/GrepStuff && cd /tmp/GrepStuff/
echo "Moved to GREPSTUFF"
grep -EIrino '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' /etc /usr /var /root /home >> IPADDRESSES 2>/dev/null
echo "IP Addresses found : Located in IPADDRESSES"
grep -EIrino '[a-zA-Z.]{1,10}[0-9]{1,4}@.*' /etc /var /root /home >> USER_Emails 2>/dev/null
echo "Username|E-Mails found : Located in USER_EMails"
grep -EIrino '[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{4}' /etc /usr /var /root /home >> CCINFO 2>/dev/null
echo "Credit Card Info Found : Located in CCINFO"
grep -EIrino '[0-9]{3}-[0-9]{2}-[0-9]{4}' /etc /usr /var /root /home >> SSINFO 2>/dev/null
echo "SSN Info Found : Located in SSINFO"
echo ""
echo "GREP SEARCHES COMPLETE : Filter as needed"