Send you an Email while the IP has changed

notify-ip-change

#!/bin/sh

# Install postfix in order to send Email
# Put this script in /etc/cron.hourly can test if the IP has changed per hour.
# Change the Email "[email protected]" to your Email

ip_file='/tmp/cur_ip'
email='[email protected]'

last_ip=`cat $ip_file`
cur_ip=`curl ifconfig.me`

if [ "$cur_ip" != "" ] && [ "$last_ip" != "$cur_ip" ]; then
        echo $cur_ip > $ip_file
        echo "IP has changed to $cur_ip"
        echo "Office IP has changed to $cur_ip" | mail -s "Office IP Changed" $email
fi