How to install repository Flathub at the Endless OS

Since Endless OS 3.2.5, Flathub is enabled by default

If you are using an older version of Endless OS, go to Settings → Details → Look for updates to update.

Learn more about Flathub on the official website

I got this:

$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
$ flatpak remote-ls flathub
error: GPG verification enabled, but no summary signatures found (use gpg-verify-summary=false in remote config to disable)
$ flatpak remotes
Name              Options             
eos-apps          system              
eos-external-apps system,no-gpg-verify
eos-runtimes      system              
eos-sdk           system              
flathub           system              
gnome             system


$ flatpak remote-delete flathub
$ flatpak remote-add --no-gpg-verify flathub https://flathub.org/repo/flathub.flatpakrepo

After this I can list all packages from flathub:

$ flatpak remote-ls flathub
Ref                                         
ca.desrt.dconf-editor                       
ch.x29a.playitslowly                        
com.albiononline.AlbionOnline               
...
...
...

Endless now comes with Flathub enabled by default so all of the latest apps should now show up automatically in the Endless App Center when you update to the latest version of Endless OS.