Can't beat Wikipedia's simplicity:
Filesystem Hierarchy Standard > FHS compliance
Modern Linux distributions include a /sys
/sys
directory as a virtual filesystem (sysfssysfs, comparable to /proc/proc
, which is a procfsprocfs), which stores and allows modification of the devices connected to the system, whereas many traditional UNIX and Unix-like operating systems use /sys/sys
as a symbolic link to the kernel source tree.
I guess that, when this /sys
directory got finally standardized, a description and its specification will be added to the Specifications ArchiveSpecifications Archive under the Filesystem Hierarchy Standard documentation.