Installing
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2. Enabling Flatpak RepoThen to Add Flatpak Repository for Elementary OS 
 Execute:sudo add-apt-repository ppa:alexlarsson/flatpak And then to Refresh Apt Repos Elementary OS: 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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3. Installing FlatpakFinally, to Install Flatpak for Elementary OS 
 Simply play:sudo apt install flatpak 
Contents
