DNS (Domain name system).

Steps Setting Up a Primary Name Server:

1. Check your ip using ifconfig command.

In this example the ip  of the system is 192.168.216.131 and FQDN (fully qualified domain name)             is “kalwa2.home.com”.

2. Add entry below entry in the file /etc/sysconfig/network-scripts/ifcfg-eth0

DNS1=192.168.216.131

e.g.

# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=”eth0″
BOOTPROTO=”dhcp”
HWADDR=”00:0C:29:9F:B1:76″
IPV6INIT=”no”
DNS1=192.168.216.131
NM_CONTROLLED=”yes”
ONBOOT=”yes”

3. Add below entry in the /etc/hosts file.

192.168.216.131 kalwa2.home.com kalwa

4. Add below entry in the /etc/sysconfig/network

HOSTNAME=kalwa2.home.com