Use RSA CA Certificates with OpenSSH 8.2
OpenSSH 8.2 is coming to the latest Long-Term Service release of Ubuntu, Focal Fossa (20.04), and has some breaking changes for users using an SSH Certificate Authority.
Managing servers with OpenSSH Certificate Authority
Since the addition of the website server for an external corporation, I now have 5 Linux servers to manage on my own. I also have 4 terminal devices that I use to connect to those servers: two of my laptops, my Android phone (using Termux), and one of those servers that I use as a workstation.