Personal Package Archives (PPA) is a great software repository service from Ubuntu to its users, to be able to upload and use personal repository to install various software with specific purposes (mostly used by software developer to store their newest source code). If you want to use the PPA version as default repository in your Ubuntu system, you have to pin the repo so APT will use it as default repository. For example, I want to make Firefox Beta PPA as the default repository to install Firefox Browser on my Ubuntu system. Here are the steps to pin Firefox Beta PPA to be the default repo: 1. Add the repo: sudo add-apt-repository ppa:mozillateam/firefox-next sudo apt update 2. Find out the repo release sudo apt-cache policy Find the repo release in the output lines. Started with o=LP-PPA 3. Create pin configuration Use your favorite text editor: sudo gedit /etc/apt/preferences.d/firefox-next.pref Put this line of codes: Package: * Pin: release o=LP-PPA-mozillateam-fire...
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