Validating Network Configuration and Configuring Network Services

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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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Lab Info

Level

Beginner

Last updated

Sep 10, 2025

Duration

30m

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.
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 8.8.8.8 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.
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: 10.0.10.10/24
  
  Gateway: 10.0.10.1
- Confirm the connection was created.
- Confirm the new interface has the correct IP Address.

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