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Linux really has come a long way
(lemmy.dbzer0.com)
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
Well that's just it; Endeavour is not a beginner distro. It's not designed to be. Endeavour is Arch with a graphical installer and some modest quality of life improvements for users who are otherwise willing to trawl through the Arch wiki for answers. The welcome app really just seems to be there so that you don't have to memorize all the commands or set up aliases, etc, if you don't want to.
So when you ask "am I supposed to X," the answer is that there really isn't a set-in-stone workflow to accomplish anything on EOS or Arch; what you're supposed to do is read the manual, so to speak, and decide for yourself how you want to go about things.
Unlike some other Arch based distros like BlendOS and Manjaro, Endeavour is still very much a DIY distro.