How to change Hostname on centos linux

Edit betwork :

# sudo nano /etc/sysconfig/network

edit this line :
HOSTNAME=myserver.kusdi.com


edit host :

#vim /etc/hosts

add a line after localhost :

127.0.0.1               localhost.localdomain localhost
192.9.19.1              myserver.kusdi.com myserver

run hostname :

#hostname myserver.kusdi.com
#hostname 
myserver.kusdi.com

Restart Networking

#/etc/init.d/network restart