Domain Name System
Update /etc/hosts
file
Using a text editor, open the hosts file on each host in your cluster.
sudo vi /etc/hosts
Add a row for each host in your cluster. The line must consist of the IP address and the FQDN.
1.2.3.4 <fully.qualified.domain.name>
danger
Do not delete the following two lines from your hosts file. Deleting or changing the following lines may cause various programs that require network functionality to fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
Define the hostname
Confirm that the hostname is set by running the following command:
sudo hostname -f
This should return the <fully.qualified.domain.name>
you just defined.
Use the "hostname" command to set the hostname on each host in your cluster.
sudo hostname <fully.qualified.domain.name>
Edit the network configuration file
Using a text editor, open the network configuration file on each host and set the desired network configuration for each host.
sudo vi /etc/sysconfig/network
Edit the HOSTNAME
property to set the fully qualified domain name.
NETWORKING=yes
HOSTNAME=<fully.qualified.domain.name>