Fix: Raspberry Pi OS - Failed to Fetch HTTP Error

When trying to update your Raspberry Pi OS, you may encounter an error that reads 'Failed to fetch http.' This can be frustrating, especially if you're new to Linux or aren't familiar with troubleshooting common issues. In this tutorial, we'll walk you through the steps to resolve this issue and get your Raspberry Pi OS updated.

The problem arises when the repository URLs for your operating system version are removed from most mirrors because it has reached its end-of-life. This means that the updates for your OS version are no longer hosted by default mirrors, leading to the 'Failed to fetch' error.

To resolve this issue, you'll need to edit your `/etc/apt/sources.list` file to point to the old-releases mirror. This will allow you to update your Raspberry Pi OS and get the latest security patches.

Here's a step-by-step guide:

1. Open the terminal on your Raspberry Pi and type: `sudo nano /etc/apt/sources.list`

This will open the `/etc/apt/sources.list` file in the nano text editor.

2. Look for the lines that start with 'deb' and are followed by a URL. These are the repository URLs that need to be updated.

For example, you may see lines like:

```

deb http://archive.raspbian.org/raspbian impish main

deb-src http://archive.raspbian.org/raspbian impish main

```

3. Replace these lines with the following command:

`sudo sed -i -r 's///g' /etc/apt/sources.list`

This will remove the old repository URLs and replace them with the new ones.

4. Run the `update` command to update your package list: `sudo apt update`

5. Once the update is complete, you can run the `upgrade` command to upgrade your Raspberry Pi OS: `sudo apt full-upgrade`

6. Finally, consider releasing an upgrade by running the following command:

`sudo sed -i -r 's/(.)?//g' /etc/apt/sources.list`

This will edit your `/etc/apt/sources.list` file again to point to the old-releases mirror.

After completing these steps, you should be able to update your Raspberry Pi OS without encountering any issues. Remember to run `sudo apt full-upgrade` regularly to keep your system up-to-date and secure.

If you're still experiencing issues or have questions about this tutorial, please feel free to ask in the comments below.

Cant sudo apt get update raspberry pi