5.5.1. Installed Documentation
Below is a list of directories you can consult for more information about the proc file system. These documents are installed through the kernel-doc package.
/usr/share/doc/kernel-doc-<version>/Documentation/filesystems/proc.txt — Contains assorted, but limited, information about all aspects of the /proc/ directory.
/usr/share/doc/kernel-doc-<version>/Documentation/sysrq.txt — An overview of System Request Key options.
/usr/share/doc/kernel-doc-<version>/Documentation/sysctl/ — A directory containing a variety of sysctl tips, including modifying values that concern the kernel (kernel.txt), accessing file systems (fs.txt), and virtual memory use (vm.txt).
/usr/share/doc/kernel-doc-<version>/Documentation/networking/ip-sysctl.txt — A detailed overview of IP networking options.