1.3 /etc/hosts

1.3: /etc/hosts

In order to correctly resolve name to IP address we need some sort of name resolution. We already have a DNS name server which is capable of doing this as per section 7.0: BIND DNS; however it is desirable to have a backup feature such as entries in the /etc/hosts file.

Step1

On node1 we will edit the hosts file to reflect our configuration.

[root@node1 ~]# vi /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       node1   localhost.localdomain   localhost
192.168.0.2     node1.differentialdesign.org
192.168.0.3     node2.differentialdesign.org
192.168.0.4     nodes.differentialdesign.org

Step2

Login to node2 and edit the /etc/hosts file.

[root@node2 ~]# vi /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       node2   localhost.localdomain   localhost
192.168.0.2     node1.differentialdesign.org
192.168.0.3     node2.differentialdesign.org
192.168.0.4     nodes.differentialdesign.org