Installing
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2. Setting Up Flatpak
How to Install Flatpak on Ubuntu 18.04
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3. Installing GNOME Builder
Then to Install GNOME Builder Flatpak App on Ubuntu 18.04
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.Builder.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.
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