Step-by-step – Telegram Flatpak CentOS 7 Installation

Installing

2. 2. Setting Up Flatpak

   How to Setup Flatpak on CentOS 7

   Flatpak CentOS 7 Installation Guide

   Flatpak CentOS 7 Setup

3. 3. Installing

   Then to Install Telegram App on CentOS 7
   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://flathub.org/repo/appstream/org.telegram.desktop.flatpakref

   The Flatpak App Setup do Not need the sudo Command because then it Runs confined into a Sandbox.
   Authenticate to Update the Repos:
   
   Then Confirm with ‘y’ for Installation.
   And Wait patiently until the App is Downloaded, Built and Installed…
   The first Flatpak App Setup may be quite Large & Long because it need to Setup some Base Components.