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Configuring Network Interfaces on Linux

Configuring network interfaces is an important skill for Linux administrators, both professionally and personally. In this hands-on lab, you'll configure two network interfaces: the first using the older network-scripts method and the second with the more modern Network Manager method.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 30m
Last updated
Clock icon Aug 22, 2025

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Table of Contents

  1. Challenge

    Configure the eth1 Interface Using Network Scripts on Server 1

    On Server 1, configure the eth1 interface using network-scripts:

    1. In /etc/sysconfig/network-scripts, create a copy of ifcfg-eth0 called ifcfg-eth1.
    2. Update ifcfg-eth1 to have the following specifications:
      • Set the boot protocol to none.
      • Set the device to eth1.
      • Match the MAC address to the one assigned to the eth1 device.
      • Set the IP address to 10.0.2.20.
      • Set the netmask to 255.255.255.0.
      • Set the broadcast address to 10.0.2.255.
    3. Restart the network service.
    4. Ensure the interface is up and running

  2. Challenge

    Configure the eth1 Interface Using nmcli on Server 2

    On Server 2, configure the eth1 interface using nmcli:

    1. Ensure that network manager is started and enabled
    2. Configure the eth1 connection using nmcli with the following specifications:
      • Set the connection name to System eth1.
      • Set the interface name to eth1.
      • Set the IP address to 10.0.3.20.
      • Set the netmask to 255.255.255.0.
    3. Ensure that the eth1 interface is up and running.
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