ddns-linode/updatedns.sh

#!/bin/sh
IP="$(curl ipinfo.io/ip)"
OLDIP="$(more current-ip)"
TOKEN="$(more token)"
DOMAIN="$(more domain)"
RECORD="$(more record)"
NAME="$(more name)"

echo Current IP: $IP
echo Old IP: $OLDIP

# # Lists all the domains using a specific token
# curl -H "Authorization: Bearer $TOKEN" https://api.linode.com/v4/domains

# # List all the records for a specific domain
# curl -H "Authorization: Bearer $TOKEN" \
#     https://api.linode.com/v4/domains/$DOMAIN/records

if [ "$IP" != "$OLDIP" ]
then
echo "DNS Requires Updating!"
echo $IP > current-ip
curl -H "Content-Type: application/json" \
    -H "Authorization: Bearer $TOKEN" \
    -X PUT -d '{
      "type": "A",
      "name": "'"$NAME"'",
      "target": "'"$IP"'",
      "priority": 10,
      "weight": 5,
      "port": 80,
      "service": null,
      "protocol": null,
      "ttl_sec": 0,
      "tag": null
    }' \
    https://api.linode.com/v4/domains/$DOMAIN/records/$RECORD
else
echo "The IPs match, no need to update :)"
fi