namecheapdns.sh

#!/bin/sh

LINODE_API_KEY="12345"
DOMAIN_ID="12345"
SUB_NAME="my.sub.domain.com"
WAN_IP=`curl -s ipecho.net/plain`;
OLD_WAN_IP=`cat /tmp/CURRENT_WAN_IP.txt`

if [ "$WAN_IP" = "$OLD_WAN_IP" ]; then
  echo "IP Unchanged"
else
  echo $WAN_IP > /tmp/CURRENT_WAN_IP.txt
  curl -H "Authorization: Bearer $LINODE_API_KEY" -H "Content-Type: application/json" -X POST -d "{\"type\": \"A\",\"target\": \"$WAN_IP\",\"name\": \"$SUB_NAME\"}" https://api.linode.com/v4/domains/$DOMAIN_ID/records;
fi