ceph configuration

so i cant attach the screenshots for some reason so ill just copy paste it over here -First issue root@CIS-Node6:\~# ceph dashboard create-self-signed-cert no valid command found; 10 closest matches: pg stat pg getmap pg dump...

Long story short... not possible. I'm planning to install and use ceph and HA in my working cluster enviroment. I have 4 nodes with 256GB RAM each and 2x10G NICs dedicated for ceph cluster network traffic. I already know this may be not enough for perfect performance so I'm planning to swap NICs...