When I am trying to update my Ubuntu 17.10 system with sudo apt-get update I am receiving the following error for one of the repositories:
Err:9 http://ppa.launchpad.net/ubuntu-desktop/ubuntu-make/ubuntu artful Release
404 Not Found
E: The repository 'http://ppa.launchpad.net/ubuntu-desktop/ubuntu-make/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
I am not able to trace the repository in the /etc/apt/sources.list or /etc/apt/sources.list.d
This issue has been observed very recently. Can anybody tell me how to find this repository and disable or remove it? Because of this error I am not able to update my system. Thanks