How to Install
2. Installing Signal Desktop
Then to Install Signal Desktop Flatpak App on Ubuntu 22.04
To Setup the Repo play:flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
For further Insight see the Flatpak Official Documentation.
And after:flatpak install https://dl.flathub.org/repo/appstream/org.signal.Signal.flatpakref
The Flatpak App Setup do Not need the sudo Command because then it Runs confined into a Sandbox.
However you’ll be Prompted to Authenticate with your’s User or Admin Pass.
Then Confirm the proposed Setup with ‘Enter’ and Wait patiently until the App is Downloaded, Build and Installed.3. Launching Signal Desktop
Finally, Launch & Enjoy Signal Desktop
Use the Desktop Launcher:
Of from Shell with:flatpak run org.signal.Signal