this post was submitted on 09 Apr 2025
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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.
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Measuring these uncustomized directly after booting is a pretty flawed metric, especially with something like KDE that has a lot of features that can be enabled or disabled. i.e. many features that are built into KDE might need external programs that are not included in the base install of LXQt or XFCE, and some stuff might get reused when you start opening LibreOffice, Firefox or a text editor (AFAIK this is definitely a thing if you use a lot of KDE/Qt applicatons). The desktop comparisons I saw during KDE 5.x had it at not that much more RAM use than XFCE, and I doubt this changed that much with KDE 6. Maybe something about Wayland, though? e.g. XWayland might eat additional resources. Also, the baseline RAM use seems really high when even XFCE uses 1.4GiB by default.
For the record, I use LXQt, not KDE.