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Linux in Ukraine?
(programming.dev)
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
It is not at all coincidental. The graph is a total percentage graph. All the lines affect all other lines on the graph. If one rises then others must drop to maintain 100% total. What this does not tell you is if the total windows users dropped, or stayed the same or even if they also grew. Only that relative to Linux the total percentage of windows users dropped.
This could be because a lot of people use Windows and the few niches that do use Linux were less affected by events then the total population. Or that there was a sudden influx of requests from Linux systems for some abnormal reason (like an automated ddos attack).