I installed a small program, "speedtest-clt" It's a snap but it's old not touched in 2 years.
It works well enough, but when I update my system it's causing issues.
Err:8 https://packagecloud.io/ookla/speedtest-cli/ubuntu lunar Release
404 Not Found [IP: 2600:1f1c:2e5:6901:14d4:52d6:1cd1:60f8 443]
Reading package lists... Done
E: The repository 'https://packagecloud.io/ookla/speedtest-cli/ubuntu lunar Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
OK I can live without this program, so I uninstall it but the issue remains. I checked the sources.list and it's not there. but I still get this error. The program is not in snap list. As it stands it's blocking updates.
System info: Ubuntu Mate 23.04
/etc/apt/sources.list.d/
which is empty on a clean install - ie. that's where you should look for anything added viasudo add-apt-repository
etc. A quick look at your post shows a non-Ubuntu URL & source (so would only be in main sources.list in error) – guiverc May 13 '23 at 22:48