https://docs.redhat.com/en/documentation/Red_Hat_Enterprise_Linux/6/html/deployment_guide/sec-viewing_an_ssh_ca_certificate
14.3.7. Viewing an SSH CA Certificate | Deployment Guide | Red Hat Enterprise Linux | 6 | Red Hat...
14.3.7. Viewing an SSH CA Certificate | Deployment Guide | Red Hat Enterprise Linux | 6 | Red Hat Documentation
ssh cacertificate deployment
https://liw.fi/sshca/
SSH CA host and user certificates
ssh cahostusercertificates