DuckDNS record updater

duckdns.sh

#!/bin/bash

domain="duckdns.org"
name="example-a-record"
token="your token"
# Get public IP from ipinfo.io
public_ip="$(curl --silent ipinfo.io/ip)"

# get current record
current_record="$(dig @8.8.8.8 +short $name.$domain)"

if [ "$current_record" != "$public_ip" ]; then
    echo New public IP is $public_ip

    curl "https://www.duckdns.org/update?domains=$name&token=$token&ip=$public_ip"
else
    echo Nothing changed
fi