How to Install Signal Desktop on Ubuntu 20.04 – Step-by-step

How to Install

2. 2. Installing Signal Desktop

   Then to Install Signal Desktop Flatpak App on Ubuntu 20.04
   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. 3. Launching Signal Desktop

   Finally, Launch & Enjoy Signal Desktop
   Use the Desktop Launcher:

   
   Of from Shell with:

   flatpak run org.signal.Signal