Below are additional sources of information about proc file system.
3.5.1. Installed Documentation
Some of the best documentation about the proc file system is installed on
the system by default.
/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.
3.5.2. Useful Websites
http://www.linuxhq.com/
— This website maintains a complete database of
source, patches, and documentation for various versions
of the Linux kernel.
