If you ask ChatGPT about Ubuntu, it will tell you that it is one of the best Linux-based operating systems, partly because GNOME is built to be easy to use and accessible to all kinds of users. But there are things that are taken for granted in other distributions and do not work "out of the box" always. For example, there are times when AppImage they don't open in Ubuntu, even after I've given it execute permissions.
The AppImage are packages which, like flatpaks and snaps, include everything necessary (core software and dependencies) for the program to run, and can be launched on all Linux distributions if their architecture is compatible. As executable files that they are, after downloading them to our computer they will land without write permissions, so the first thing we have to do is right click, properties and give it permission to run as a program or open a terminal and write
chmod +x nombre-de-la-appimage.
And why don't the AppImages open on my Ubuntu?
If you're on Ubuntu and an AppImege doesn't open, it's probably because it's missing some dependency. For some time now, they might not open by default, but they do if you open a terminal first and type:
sudo apt install libfuse2
Once installed libfuse2, opening the AppImage will be as easy as double-clicking on it. Although there are clear differences, the AppImage works like some .exe or portable Windows applications. Software like Krita or upscayl They are available in this format, and they are in part because it can be uploaded directly to their website and we can download it from there. The other thing that can be uploaded the same day of a release is the tarball, but that is not so user friendly.
Of course, you can also install software like AppImageLauncher, but if the only thing we want is to open the AppImage in Ubuntu, what is explained here is enough: install libfuse2 and I will allow it to run as a program.
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