This article demonstrates how to change a CentOS® 6 server hostname.

To change the hostname, perform the following steps:

1. To verify the current hostname, run the following command:

   hostname

2. To change the hostname in the network file, run the following command:

   vi /etc/sysconfig/network

3. Find the line that contains the variable "HOSTNAME", replace its value, and save the file:

   HOSTNAME="server_name.domain.com"

4. To verify the current domain name, run the following command:

   dnsdomainname

5. To find your host IP address, run the following command:

   ip addr show

6. To change the domain name in the hosts file, run the following command:

   vi /etc/hosts

7. Add or modify the line with your host IP address, changing the domain name. Be sure to use
   a fully qualified doman name (FQDN), such as the following example:

   10.0.2.15 	server_name.domain.com server_name
   

8. Save your change and close the file.

9. After you change the domain name, you have to restart the network service. Use one of the
   following commands:

   # service network restart
    
   or
   
   # /etc/init.d/network restart
   

10. To verify the changes, execute the following commands:

    # hostname
    
    # dnsdomainname