Step-by-step – Deja Dup Installation in KDE Neon

Installing

2. 2. Setting Up Flatpak

   How to Install Flatpak on KDE Neon

   Flatpak KDE Neon Installation Guide

   Flatpak KDE Neon Setup

   First, check if it’s already there:

   which flatpak

3. 3. Installing Deja Dup

   Then to Install Deja Dup Flatpak App on KDE Neon
   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/org.gnome.DejaDup.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.