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Memory Use (RAM)
(eirenicon.org)
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
FWIW neither KDE nor gnome are Window Managers (WM), they are Desktop Environments (DE). WMs are significantly different from DEs in terms of what they provide and how they are constructed. WMs are more of a builder's kit and less of something you just install and use. If you like doing things in a specific, unique manner you might enjoy WMs. Be advised they are, almost always, much more detailed in terms of their installation.