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Validating Network Configuration and Configuring Network Services

In this hands-on lab, you will be reviewing hostname information, name resolution, and network interfaces. Using the `hostnamectl` command, you will view and update hostname for the system. You will also add an entry to the `/etc/hosts` file and a DNS server to the default network connection, reloading the interface and cycling the service to pick up the change. Finally, you will drop a network connection and recreate it, assigning it an IPv4 address and gateway. *This course is not approved or sponsored by Red Hat.*

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Path Info

Clock icon Beginner
Clock icon 30m
Clock icon Dec 04, 2020

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Table of Contents

  1. Challenge

    View and Update Hostname Information

    • Use hostnamectl to view hostname details.
    • Set a new hostname, rh8server1, for the system.
    • Set a pretty name, RH8 Lab Server, for the server.
    • Confirm new values were updated using hostnamectl.
  2. Challenge

    Update Name Resolution by Adding DNS Servers and Editing the /etc/hosts File

    • Add a line to the /etc/hosts file, using the local IP Address and the value rh8lab.
    • Ping rh8lab to confirm hosts entry works.
    • Use nmcli to view network connections.
    • Add the DNS server to the default connection, System eth0.
    • Reload the interfaces and cycle the NetworkManager service to pickup the changes.
    • Confirm the /etc/resolv.conf contains the new DNS server.
  3. Challenge

    Drop and Recreate the Secondary Network Connection

    • Use nmcli to view network connections.
    • Delete the secondary connection, Wired connection 1.
    • Recreate the connection with the following details:
      • Name: New connection
      • Interface name: eth1
      • Type: ethernet
      • IP Address:
      • Gateway:
    • Confirm the connection was created.
    • Confirm the new interface has the correct IP Address.

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