Anyone know how to do so? I am trying to change the system name on my red hat linux 7.0 server.

-Thanks!

Ehm not sure what you mean...
But if you have webmin its fairly simple..

Goto the Hardware tab
then Network Config
DNS Client

You could edit /etc/hosts, and add a like this:
127.0.0.1 Secured server.secured-net.net

Edit your /etc/sysconfig/network file. There should be a line like

HOSTNAME=server.mydomain.com

In which case, your server name will be 'server'. Reboot after editing.

You should also update DNS and/or /etc/hosts.

-Rut