How can I remove a repositry in Elementary OS 7?

Question

I am experiencing a problem with one repository not having a release file. For that reason, I would like to remove it, but I can't find the Software and Updates app in the OS to select and remove the repo in the GUI. How can I remove it in Elementary OS 7?

Answer 1

The Software and Updates app does not (to the best of my knowledge) allow a person to work with the sources list directly in Horus. That said, you can take care of this via the Terminal. Here's how:

0. Open the Terminal application
1. Change to the directory containing apt's sources.list file:

   cd /etc/apt
   

2. Edit the sources.list file to remove (or comment out) the repository that does not have a release file:

   sudo {editor of choice} sources.list 
   

   ^{Note: Be sure to replace {editor of choice} with your preferred text editor.}
3. Find the repo that needs to be removed and add a # to the start of the line, or remove it completely.
4. Save the file and exit
5. Update apt:

   sudo apt update
   

If the repository that you need to remove is not found in sources.list, then it will be contained in a file within the /etc/apt/sources.list.d directory, possibly in its own definition file.