Update an IP address's RDNS for a Linode

put https://api.linode.com/{apiVersion}/linode/instances/{linodeId}/ips/{address}

Updates the reverse DNS (RDNS) for a Linode's IP Address. This may be done for both IPv4 and IPv6 addresses.

Setting the RDNS to null for a public IPv4 address, resets it to the default ip.linodeusercontent.com RDNS value.

linode-cli linodes ip-update 123 \
  203.0.113.1 \
  --rdns test.example.org

<https://techdocs.akamai.com/cloud-computing/docs/getting-started-with-the-linode-cli>

linodes:read_write

<https://techdocs.akamai.com/linode-api/reference/get-started#oauth>