Linux Journal: The Linux /proc Filesystem as a Programmers’ Tool

“One of the best investments in time that a person with a keen
interest in operating systems can make is to explore them from
multiple angles. Operating system installation and configuration
can go a long way toward solidifying the concepts that one reads
about in system administration and networking texts. Electronic
references in the form of system manual (man) pages and the Linux
info(1) facility are available for instant consultation.
groups.google.com, with its archive of 20-plus years of Usenet
postings, can provide expert guidance on issues ranging from DNS
configuration to memory interleaving. However, I feel another
approach is singularly unique when it comes to exploring operating
systems–programming them…”

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