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Flatpack, appimage, snaps..
(leminal.space)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
A bit of history. The first universal packaging format was snap by Canonical and used to be called Click apps and it was made for the Ubuntu mobile OS and later to the Ubuntu desktop. Red Hat in response to that created the FlatPak format. The AppImages are community effort. As you can see since both snap and FlatPak are developed and supported by a company they are more widely available and easier to search, install and update them. There are multiple tools for AppImages as well, which can search, install an update, however they are not pre installed or can be installed from the repo on most distro. There are dielstros which ship AppImage support by default with App Store for example Nitrux. You can use AppMan or bauh for managing AppImages. The AppMan has command line interface and bauh is a graphical application. Bauh can also manage snap and FlatPak.