#! /bin/bash

mkdir /home/ec2-user/duckdns
cd /home/ec2-user/duckdns
touch duck.sh
echo url="https://www.duckdns.org/update?domains=$1&token=$2&ip=" | curl -k -o ~/duckdns/duck.log -K -
chmod 700 duck.sh
sudo touch /var/spool/cron/root
sudo echo "*/5 * * * * /home/ec2-user/duckdns/duck.sh >/dev/null 2>&1" >> /var/spool/cron/root
./duck.sh