[Guide] Flatpak App - Install and use Flatpak

Flatpak (Using Flatpak — Flatpak documentation) is a free (as in fully open source) alternative to Snap packages.
First of all, with jingos 1.0 the ca-certificates are out of date, you need to update them by downloading the last version:

Download the last deb file (the “…all.deb” one:
Install it:

cd ~/Downloads
sudo dpkg -i ca-certificates_202XYYZZ_all.deb

Then, install Flatpak:
sudo apt-get install flatpak

Now Flatpak is installed, but is not configured:

flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

Then you can proceed, by searching for something, in my example I’m looking for “Fluffy Chat”:

flatpak search FluffyChat

and then installing it:

sudo flatpak install FluffyChat

This will install the binary and its dependencies!

then, check what is installed:

flatpak list --app

and run it:

flatpak run the.id.found.in.list

…Unfortunately flatpaks are broken too ATM, they fail with the following issue:

bwrap: Can't mount proc on /newroot/proc: Device or resource busy

…But one day, maybe…


Great work @bboett
I added your guide to the Index:


I have downloaded a kde weather flatpack, how do I get it to work? I manged to get it installed following the guide on the kde site for debian, but it won’t launch.