644
OS market share in Top 500 supercomputers
(feddit.org)
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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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The previously fastest ran on Red Hat Enterprise Linux, the current fastest runs on SUSE Enterprise Linux.
The current third fastest (owned by Microsoft) runs Ubuntu. That's as far as I care to research.
No wayyy! Why SUSE tho?
Because Cray have CrayOS which is a slightly modded version of SuSE. Why did Cray choose SUSE probably because the licensed support was cheaper that RHEL 😂
Because all the Arch consultants were busy posting on the internet.