Setting FQDN

• FQDN
  • Finding FQDN
• Hostname
  • Finding Hostname
• Setting hostname and FQDN

FQDN

FQDN stands for Fully Qualified Domain Name. It is a domain name that specifies its exact location in the tree hierarhcy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone.

Example, somehost.example.com

Finding FQDN

hostname -f

Hostname

A hostname is a label that is assigned to a device connected to a computer network and that is used to identify the device. Example, kafka-dev

Finding Hostname

 $ hostname
AayushTuladhar-Mac.local

Setting hostname and FQDN

• Update /etc/hosts

127.0.0.1  packer-20140710152503.aayushtuladhar.com packer-20140710152503
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
<ip-addr> kafka-dev.aayushtuladhar.com kafka-dev

• Update /etc/sysconfig/network

[vagrant@kafka-dev ~]$ cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=kafka-dev.aayushtuladhar.com
NOZEROCONF=yes

• Restart the Hostname Service

/etc/init.d/network restart

• Verify Hostname and FQDN

hostname
hostname -f