Linux Hint published a tutorial about how to safely remove PPA repositories in Ubuntu.

How to safely remove PPA repositories in Ubuntu

PPA is abbreviated as “Personal Package Achieve”. PPA is a collection of packages that are hosted on the Launchpad server. Adding PPA means adding a new repository to our system. PPA repositories are unofficial repositories that are used to connect third-party software to the Ubuntu operating system. How to safely remove PPA repositories in Ubuntu is explained in this article.

How to safely remove PPA repositories in Ubuntu – Linux Hint