Knowledge base

This article is dedicated to RHEL8/9 - AlmaLinux 8/9.

After you make changes to the network interface configuration, it's crucial to restart the network, or in our case, the configured interface, for the changes to take effect.

Prerequisites 

• Server root access is required.
• We'll use NetworkManager nmcli tool (included by default)
  Note: cPanel servers on Almalinux 8 don't have access to NetworkManager.
• Assuming your interface name is eno1. Replace eno1 with your interface name.

You should follow the steps below:

1. Reload the connection
   

   nmcli connection reload

2. Restart the interface eno1
   

   nmcli connection up ifname eno1

   Replace eno1 with your interface name.
   
   - OR - 
   
   

   nmcli device down eno1;nmcli device up eno1

   Replace eno1 with your interface name.
   
   
3. Review the updated changes.

How to know the network interface/device name?

The interface name is different on each server, but you can easily know your interface name with NetworkManager cli tool.

To show active connections:

nmcli connection show

You'll find the Device name and connection UUID in the output.

You can bring a connection Up/Down using the UUID not only the device or interface name.

You can do so with the following command:

nmcli connection up {UUID}

nmcli connection down {UUID}

Replace {UUID} with the actual connection UUID.

To show configured interfaces with detailed information:

nmcli device show

This will show detailed information about the active devices/interfaces with assigned IPs.

To show the device/interface status

nmcli device status