Hello, I have taken another look also at this text file. https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/filesystems/sysfs.txt?id=a6fcdcd94927a1b24dea6a9951ffa7c64545ecfb#n276 The following information is provided at the moment. … Top Level Directory Layout ~~~~~~~~~~~~~~~~~~~~~~~~~~ The sysfs directory arrangement exposes the relationship of kernel data structures. … firmware/ net/ fs/ … TODO: Finish this section. … The directory “/sys/net” is not listed on my Linux 5.x system. Will this documentation get an update? Regards, Markus