Modify hostname on newly created media server

Hi

I have installed 7.6.0.1 Netbackup Media server on a Redhat 6.5 server recently, and i forgot to exclude the full qualified domain name from the hostname. This media server has nothing running to it whatsoever, and is just added to the Master server. How can i easily change the hostname??

I know decomissioning is mentioned, but do i need that for a media server which litteraly has no function yet apart from being a member of a master server?

Please provide detail information on how i should proceed. Thanks.