I don’t recommend it as well but it gets the job done. Remove a PPA from the source list in the terminal In the above command replace PPA_Name with the correct PPA name. sudo add-apt-repository -remove ppa:PPA_Name/ppa You can use the command in the following manner. You need to know the exact PPA name here, of course. Just give it -remove option in the command. You can use the same command to remove the PPA as well. It’s most likely that you added the PPA using add-apt-repository command. That was easy, right? Let me show an even easier method with the command line. Afterwards click on Remove to delete the PPA: In the Software & Updates tool, go to Other Software tab and choose the desire PPA from the list. Press the Super key (Windows key) and search for Software & Updates tool. To me, command line is easier but I can understand that not everyone likes it. This method is suitable if you prefer to use GUI over command line. Remove a PPA from Software Sources via GUI

You can do it from the Software & Updates application, by removing the source files from the directory or by using the add-apt-repository command. There are several ways to remove a PPA in Ubuntu. You can use the ‘apt remove’ command for that. Note: You should uninstall the application in Ubuntu which was installed by the PPA before removing the PPA itself.

Whatever be your reason, let me show you how to remove a PPA from your system. You may have other reasons as well for deleting or removing a PPA from your system. You may end up with “ Repository does not have a release file” error. This might create trouble when you try updating Ubuntu. Over the time these PPAs might not be updated with the latest version of the operating system. In the effort to install various applications in Ubuntu or other Linux distribution, you often end up adding several PPA.

Ubuntu dupeguru in bash command line