How do I modify the CNAME or TXT record of my Linode host?

See:

https://www.linode.com/docs/platform/manager/dns-manager/

— sw

Thanks, I did see this but it's not the solution. I don't wish to create a new domain in order to modify its DNS. I want to members.linode.com issued hostname's CNAME or TXT record.

I think only Linode has access to those. I'm pretty sure they are designed for just temporary usage while you're setting up your own domain.

I'm curious as to why you don't want to register your own domain? It's fast, easy, cheap…

If this is some weird requirement of DigiCert, I'd drop them like a hot rock and find someone else. I've used Let's Encrypt for years…fast, easy, cheap (free), accepted everywhere…

-- sw

Ill look into Let's Encrypt, thank you!

It is a DigiCert requirement. Part of the process of verifying I have ownership/control over the domain requesting the cert.

If you register your own domain, you will have ownership/control of it. That will not be the case for a members.linode.com domain. Linode owns/controls them…always.

— sw