show ip before login for ubuntu

gistfile1.sh

#!/bin/sh

if [ "$METHOD" = loopback ]; then
    exit 0
fi

# Only run from ifup.
if [ "$MODE" != start ]; then
    exit 0
fi
IP=`/sbin/ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{ print $2 }' | awk -F: '{ print $2 }'`
cp /etc/issue-standard /etc/issue
echo "$IP"  >> /etc/issue
echo "" >> /etc/issue

# abouve to /etc/network/if-up.d/show-ip-address   +x