It's NumbeR. I don't have an authoritative source other than e.g. [0], but I was around (IRC, mailing lists) when some of these were created. [0]: https://gith

It's NumbeR. I don't have an authoritative source other than e.g. [0], but I was around (IRC, mailing lists) when some of these were created. [0]: https://github.com/torvalds/linux/blob/master/Documentation/admin-guide/sysctl/fs.rst#nr-open https://github.com/torvalds/linux/blob/master/Documentation/...