Red Hat Training
A Red Hat training course is available for Red Hat Enterprise Linux
20.8. Additional Resources
The OpenSSH and OpenSSL projects are in constant development, and the most up-to-date information for them is available from their websites. The man pages for OpenSSH and OpenSSL tools are also good sources of detailed information.
20.8.1. Installed Documentation
ssh-keygenman pages — These man pages include information on how to use these commands as well as all the parameters that can be used with them.