DNS is nothing but the numerical form of IP address which can be easily remembered and used. It can resolve full domain name from the IP address and vice-versa. There is master name server and slave name server.
Configuration of DNS server
To install DNS server we need to install bind package from terminal using following command:
# yum search bind
It will list all available bind packages. From all packages we have installed bind.i686 : The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) server. Command is as follows.
