How to setup as DNS client / name server IP address

Many new Linux user finds it difficult to setup / modify new name server address (NS1 / NS2).

Local name resolution is done via /etc/hosts file. If you have small network then use /etc/hosts file. DNS (domain name service is accountable for associating domain names with ip address, for example domain yahoo.com is easy to remember than IP address 202.66.66.12) provides better name resolution. To configure Linux as DNS client you need to edit or modify /etc/resolv.conf file. This file defines which name servers to use. You want to setup linux to browse net or run network services like www or smtp; then you need to point out to correct ISP DNS servers:

Setup DNS Name resolution

Steps to configure Linux as DNS client, first login as a root user (use su command):

Step # 1: Open /etc/resolv.conf file:

# vi /etc/resolv.conf

Step #2: Add your ISP nameserver as follows:

search isp.com
nameserver 202.54.1.110
nameserver 202.54.1.112
nameserver 202.54.1.115

Note Max. three nameserver can be used/defined at a time.

Step # 3:Test setup nslookup or dig command:

$ dig www.nixcraft.com $ nslookup www.nixcraft.com