Step-by-step – XnView MP Installation in Fedora 34

Installing

2. 2. Setting Up Flatpak

   How to Install Flatpak on Fedora 34

   Flatpak Fedora 34 Installation Guide

   Flatpak Fedora 34 Setup

   First, check if it’s already there:

   which flatpak

3. 3. Installing XnView MP

   Then to Install XnView MP Flatpak App on Fedora 34
   Simply 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/com.xnview.XnViewMP.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 User or Admin Pass.
   Then Confirm the proposed Setup with ‘Enter’ and wait until the App is Downloaded and Installed.