Installing
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2. Enabling Repo
Then to Add Flatpak Repository for Lubuntu
Execute:sudo add-apt-repository ppa:alexlarsson/flatpak
And if you Get a Missing Repo Issue then Amend it Manually with:
sudo nano /etc/apt/sources.list.d/*flatpak*.list
Changing ‘focal’ in ‘eoan’!
Ctrl+x to Save & Exit from nano Editor.
And then to Refresh Apt Repos Lubuntu:sudo apt update
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3. Installing Flatpak
Finally, to Install Flatpak for Lubuntu Focal
Simply play:sudo apt install flatpak
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