Linux for Starters

Linux for Starters: Your Guide to Linux – Installing Software – Part 7


Flatpak is an open source containerized package format similar to Snap. While Snap relies on a central repository for software, Flatpak can be installed from different sources. The primary source is Flathub.

A vanilla installation of Ubuntu 21.04 doesn’t include support for Flatpak. The Ubuntu Software app is distributed as a Snap and does not support graphical installation of Flatpak apps.

Let’s first install flatpak by opening up a terminal and entering the command:

$ sudo apt install flatpak

To install Flatpak from a graphical source, install the Gnome Software Plugin.

$ sudo apt install gnome-software-plugin-flatpak

The plugin for the Software app makes it possible to install apps without needing the command line. Installing the Flatpak plugin will also install a deb version of Software and result in two Software apps being installed at the same time.

The icon for this version of Software is shown below:

GNOME Software

Add the Flathub repository for a wide selection of Flatpaks.

$ flatpak remote-add --if-not-exists flathub

To complete setup, restart your system. Once restarted you can run Software to install regular deb packages, Snaps, and Flatpaks.

Page 4 – AppImage

Pages in this article:

Pages in this article:
Page 1 – Software Updates
Page 2 – Ubuntu Software Application
Page 3 – Flatpak
Page 4 – AppImage

All articles in this series:

Linux For Starters: Your Guide to Linux
Part 1What is Linux? Why use Linux? What do I need?
Part 2Choose a Linux distribution meeting your specific needs and requirements.
Part 3Make a bootable Ubuntu USB stick in Windows.
Part 4We show you how to install Ubuntu 21.04 on your hard disk.
Part 5Things to do after installing Ubuntu.
Part 6Navigating your way around the Desktop.
Part 7Updating the system, install new software.
Part 8Open source replacements for proprietary Windows desktop software.
Part 9Get started with the power and flexibility of the terminal.
Part 10We cover the basics of files and permissions.
Part 11Getting help from your system.
Part 12Learn all about the file system.
Part 13Manipulating files from the shell.
Part 14Maintain your system with these simple tips.
Part 15Managing users on your system.
Part 16Explore different desktops to GNOME 3.
Part 17Gaming on Linux.
Part 18Protect your privacy with this guide.
Part 19Access the Windows desktop from Linux using a remote desktop client.
Part 20Set up a virtual machine running Ubuntu as the host and openSUSE as the guest.
Part 21Wine lets you run Windows programs on Linux without emulation.
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