Ubuntu 24.04 flatpak repository add - flathub

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

 

[ Install Log ]

gangserver@SS200B:~$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

Note that the directories 

'/var/lib/flatpak/exports/share'
'/home/gangserver/.local/share/flatpak/exports/share'

are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the
session is restarted.