Ubuntu server boot notification script

notify.sh

#!/bin/bash
#
# *************************************************
# chkconfig: 2345 99 99
# description: notify email address on system boot.
#
# https://gist.github.com/marshallmick007/9025968
# *************************************************
# Installing:
# 1) save as /etc/init.d/notify
# 2) set the desired email address in "MAILADD" variable
# 3) chmod a+w /etc/rc.d/notify
# 4) sudo update-rc.d notify defaults

### BEGIN INIT INFO
# Provides:          notify
# Required-Start:    $all
# Required-Stop:     $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts notify
# Description:       Sends an email when the server boots up
### END INIT INFO

PATH=/bin:/usr/sbin:/usr/bin
SERVER=`hostname`
case $1 in
    start)
        PUBLIC_IP=`curl --connect-timeout 5 -s icanhazip.com`
        PUBLIC_IPV6=`curl -6 --connect-timeout 5 -s icanhazip.com`
        MAILADD=your@email.example
        mail -s " Boot of $SERVER" $MAILADD <<EOF
From: $0
To: $MAILADD
$SERVER has booted up.
public ip $PUBLIC_IP $PUBLIC_IPV6
If this is news to you, please investigate.
`date -u`
EOF
    ;;
esac
exit 0