View source for Change Host Name

The guidance below will allow the host name to be changed from localhost.localdomain.

[[Open Terminal as root]] and execute the following commands:
* Current hostname:
 hostname
* Set new hostname (replace with the desired hostname):
 hostname server.amahi.net
* Make the change permanent:
 hostnamectl set-hostname server.amahi.net
* Verify change:
 hostnamectl

That's it.  No reboot required.


REF:  [http://www.server-world.info/en/note?os=Fedora_23&p=hostname Change Fedora 23 Hostname]