How to Fix Repositories on Ubuntu for Arm64 Servers

Introduction: When dealing with Ubuntu on Arm64 servers, sometimes you may need to reset or fix your repository sources to ensure that you can properly update and install packages. This guide will walk you through the steps to fix the repositories on an Ubuntu Arm64 server by editing the sources.list file.

Step-by-Step Tutorial

Step 1: Open the sources.list File

First, you need to open the sources.list file in a text editor with superuser privileges. This file contains the list of repositories that your system uses to download updates and new software packages.

Open a terminal and type the following command:

This command opens the sources.list file using the nano text editor with superuser privileges.

Step 2: Clear the Existing Content

Once the sources.list file is open, you will see the current list of repositories. Delete everything in the file. You can do this by holding down the Ctrl key and pressing K repeatedly until all lines are removed.

Step 3: Add the New Repository URLs

Next, you will add the following lines to the sources.list file. These lines specify the repositories for the Arm64 architecture on Ubuntu focal (20.04) with various components:

deb [arch=arm64] http://ports.ubuntu.com/ focal main multiverse universe
deb [arch=arm64] http://ports.ubuntu.com/ focal-security main multiverse universe
deb [arch=arm64] http://ports.ubuntu.com/ focal-backports main multiverse universe
deb [arch=arm64] http://ports.ubuntu.com/ focal-updates main multiverse universe

Copy and paste these lines into the sources.list file.

Step 4: Save and Exit the Text Editor

After adding the new repository URLs, save the changes and exit the text editor. In nano, you can do this by pressing Ctrl + X, then Y to confirm saving the changes, and finally Enter to write the changes to the file and exit.

Step 5: Update the Package List

Now that the sources.list file has been updated with the correct repositories, you need to update your package list to reflect these changes. Run the following command in the terminal:

This command fetches the latest package lists from the repositories specified in your sources.list file.

Conclusion

By following these steps, you have successfully fixed the repositories on your Ubuntu Arm64 server. Your system should now be able to update and install packages from the correct sources. If you encounter any issues, ensure that the URLs and syntax in the sources.list file are correct.