16.5. Changing the Hostname or DNS Client Settings
Every UNIX system has a hostname, which appears in the login prompt, system logs, outgoing email and on every Webmin page. Normally the hostname is the same as or part of the DNS name for the system's IP address, but this does not have to be the case, especially if the system is not connected to a network or only connects occasionally via dialup. However, for permanently connected systems the hostname should be the hosts fully qualified DNS name (like server1.foo.com), or just the first part (like server1). Anything else is likely to cause confusion and possibly network problems.
When a Linux system is first set up, you get to choose the hostname as part of the distribution's installation process. ...
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