How to modify a server's hostname from the command line

Introduction

There are a few ways that the hostname can be modified from the command line. The recommended method is to use cPanel's API.

Procedure

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Run the following command.

   whmapi1 sethostname hostname=$hostname.domain.tld

   Please note that "$hostname.domain.tld" needs to be replaced with the new hostname. 

Additional resources

Effective Hostname Usage With cPanel & WHM

What Is an FQDN?