Duck DNS AWS ubuntu startup script

init.sh

#!/bin/bash
#Adopted from https://cloudhobbyist.com/aws-vpn-2/

DDNS_DOMAIN="PUT_YOUR_DOMAIN_HERE"
DDNS_TOKEN="PUT_YOUR_API_TOKEN_HERE"

#DDNS setup
mkdir /home/ubuntu/duckdns
touch /home/ubuntu/duckdns/duck.sh
echo "#!/bin/bash

curl -o /home/ubuntu/duckdns/duck.log \"https://www.duckdns.org/update?domains={$DDNS_DOMAIN}\
&token={$DDNS_TOKEN}\"

echo "" >> /home/ubuntu/duckdns/duck.log" >/home/ubuntu/duckdns/duck.sh
chmod +x /home/ubuntu/duckdns/duck.sh
crontab -l | { cat; echo "*/5 * * * * /home/ubuntu/duckdns/duck.sh >/dev/null 2>&1"; } | crontab -