This command is not correct for Satellite 6.12.x. "katello-certs-check" now requires an additional parameter "-t [satellite|capsule"], so this documentation should be update to reflect that change.

Reported by: cwrujan3

https://access.redhat.com/documentation/en-us/red_hat_satellite/6.12/html/installing_satellite_server_in_a_connected_network_environment/performing-additional-configuration#annotations:1621b591-1f68-4fc9-8541-2e49e71c147c