Table of Contents

About

This article shows you how to manage the Fully Qualified Domain Name (FQDN) in Linux

Management

Get

You can check:

  • the FQDN 
hostname -f
# or 
hostname --fqdn
  • or the domain name
dnsdomainname
# same as
hostname -d

Set

Host file

The recommended method of setting the FQDN is to make the hostname be an alias for the fully qualified name using host file (ie /etc/hosts), DNS, or NIS.

For example, if the hostname was “ursula”, one might have a line in /etc/hosts which reads 

127.0.1.1    ursula.example.com ursula

DNS resolver

in the search properties of the Linux - The DNS resolver (/etc/resolv.conf) file

Documentation / Reference