Step-by-step – Flatpak Ubuntu 20.04 Installation Guide

Setting Up PPA

2. 2. Enabling Flatpak Repo

   Then to Add Flatpak Repository for Ubuntu
   Execute:

   sudo add-apt-repository ppa:alexlarsson/flatpak

   And then to Refresh Apt Repos:

   sudo apt update

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

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