Lab 19: Configure Hostname

Objective Focus

Manage basic networking :Configure hostname resolution

Official RHCSA EX200 Exam Objectives

Get the hostname of the system
$ hostname
  • Please note that using the hostname command to change the hostname will not survive a reboot.
Change the hostname of the system
$ hostnamectl set-hostname <newname>
  • If you are not root, sudo will be required
$ nmtui
  • nmtui can also be used to change the hostname. I prefer this method!
$ /etc/hostname
  • Local hostname configuration file
$ /etc/hosts
  • Static table lookup for hostnames
$ /etc/resolv.conf
  • Resolver configuration file
Why Hostname is important

IPv4 and IPv6 addresses are really difficult for us, humans, to remember. So, we assign hostnames to computers like a name tag. It is like when we save a phone number and we add a name to the contact info.

That is it for this lab, understanding hostnames will help us tremendously in the field. And it is used in combination with a lot of other commands.