Set Hostname on OS X - Sysadmin Notebook

Set primary hostname (FQDN).

sudo scutil --set HostName <new host name>

Set Bonjour hostname (local).

sudo scutil --set LocalHostName <new host name>

Set computer name.

sudo scutil --set ComputerName <new name>

Flush DNS cache.

dscacheutil -flushcache

Reboot.