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How To Fix Ubuntu 22.04 Apt-Get Update Connection Failure Issue

Ubuntu 14

In this article, we will delve into the issue of Ubuntu 22.04 apt-get update connection failure and provide a detailed guide on how to fix this problem. This issue can occur due to various reasons, including incorrect repository URLs, network restrictions, or firewall settings.

Quick Answer

To fix the Ubuntu 22.04 apt-get update connection failure issue, you can start by checking the repository URLs in the /etc/apt/sources.list file and correcting any incorrect URLs. If that doesn’t solve the problem, check for network restrictions such as antivirus software or firewall settings blocking internet access. If the issue persists, you can try changing the repository server or configuring apt to use a proxy server.

Understanding the Issue

When you run the sudo apt-get update command, your system attempts to fetch the latest updates from the repositories listed in the /etc/apt/sources.list file. If there is a connection failure, the system will fail to fetch these updates, which can lead to outdated software or security vulnerabilities.

Checking Repository URLs

One of the common reasons for this issue is incorrect repository URLs. To check this, open the /etc/apt/sources.list file using the following command:

sudo nano /etc/apt/sources.list

In this command, sudo is used to run the command with root privileges, nano is a command-line text editor, and /etc/apt/sources.list is the file you want to open.

Ensure that the URLs are correct. For example, the URL “” should be “”. If there are any incorrect URLs, correct them and save the file.

Checking Network Restrictions

Another common cause of this issue is network restrictions. This could be due to antivirus software or firewall settings blocking the internet access. To resolve the problem, you can try temporarily disabling your antivirus software and checking if the issue persists.

If you are using a firewall, ensure that it allows outbound connections for the relevant applications. For example, if you are using VirtualBox, you need to allow outbound connections for it.

Further Troubleshooting

If the issue persists after checking the repository URLs and network restrictions, you may need to perform further troubleshooting.

One method is to change the repository server. Ubuntu provides multiple servers to fetch updates from, and you can switch to a different server if one is not working. Open the “Software & Updates” application, go to the “Ubuntu Software” tab, and select a different server from the “Download from” dropdown menu.

Another method is to use a proxy server. If your system is behind a proxy server, you need to configure apt to use it. Open the /etc/apt/apt.conf file and add the following lines, replacing proxy_url and proxy_port with your proxy server’s URL and port:

Acquire::http::Proxy "http://proxy_url:proxy_port";
Acquire::https::Proxy "https://proxy_url:proxy_port";


Connection failures when running sudo apt-get update can be frustrating, but they can be fixed by checking the repository URLs, network restrictions, and performing further troubleshooting if necessary. By following the steps in this guide, you should be able to resolve this issue and keep your Ubuntu 22.04 system up to date.

Remember, it’s always important to keep your system updated to ensure you have the latest features and security updates. If you continue to experience issues, don’t hesitate to seek help from the Ubuntu community or professional support.

How do I open the `/etc/apt/sources.list` file?

To open the /etc/apt/sources.list file, you can use the following command in the terminal: sudo nano /etc/apt/sources.list. This command opens the file in the nano text editor with root privileges.

How can I temporarily disable my antivirus software?

The method to temporarily disable antivirus software can vary depending on the software you are using. In most cases, you can find an option to disable or pause the antivirus protection in the settings or system tray icon of the antivirus software. Refer to the documentation or support resources provided by your antivirus software for specific instructions.

How do I configure apt to use a proxy server?

To configure apt to use a proxy server, you need to edit the /etc/apt/apt.conf file. Open the file using a text editor with root privileges, and add the following lines, replacing proxy_url and proxy_port with your proxy server’s URL and port:

Acquire::http::Proxy "http://proxy_url:proxy_port";
Acquire::https::Proxy "https://proxy_url:proxy_port";

Save the file and run sudo apt-get update for the changes to take effect.

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