Configure DNS, search domain, and host name

1. Configure DNS and search domain

The file that specifically configures DNS is/etc/resolv. conf; you can also specify it in the configuration file of NIC configurations such as ifcfg-eth0.

Example:

[Root @ instructor Desktop] # cat/etc/resolv. conf
Search example.com
Nameserver 192.168.0.254
[Root @ instructor Desktop] #

Ii. Configure the Host Name

[Root @ instructor Desktop] # cat/etc/sysconfig/network
NETWORKING = yes
HOSTNAME = instructor.example.com
NISDOMAIN = notexample
[Root @ instructor Desktop] #

3. Configure host records

[Root @ instructor Desktop] # cat/etc/hosts
127.0.0.1 localhost. localdomain
: 1 localhost6 localhost6.localdomain6
192.168.0.254 instructor.example.com instructor I
[Root @ instructor Desktop] #