hostname change how to....

Hello All,

I have RH 7.2, Apache 1.3.27 & Bind 9 with around 700 websites. I need to
change the hostname of the server. What effect will it make if I change the
server's hostname?

The files I should be editing are:
- /etc/hosts
- /etc/sysconfig/network
- /etc/named.conf
- /var/named/

Anything else should be taken care off? Should I reboot the server or only
restart the deamon.

Thank you,

Tina.