change PVE hostname

Search this forum, this is already discussed multiple times and you will find a lot of threads.
 
ok i read the forum, and in my case i need only to change domani suffix (ex. pvename.local.domain) local.domain in other.
i understand that is sufficient edit /etc/hosts and hostname and other service that use this domain.

the node not use domain suffix in /etc/pve/nodes/pvename
exemple (https://forum.proxmox.com/threads/renaming-proxmox-4-node.27069/#post-136201)
correct?

no problem with http gui certificate ?