Why is all this command line stuff necessary?

[probono]

The command line is not needed to use AppImages at all.
Just download, make executable, and double click to run.

How to run an AppImage

Before you can run an AppImage, you need to make it executable. This is a Linux security feature. There are three main ways to make an AppImage executable: 1. With the GUI Open your file manager and browse to the location of the AppImage Right-click on the AppImage and click the ‘Properties’ entry Switch to the Permissions tab and Click the ‘Allow executing file as program’ checkbox if you are using a Nautilus-based file manager (Files, Nemo, Caja), or click the ‘Is executable’ checkbox if yo…