"There are two Linux file systems that continually prove to be
confusing stumbling blocks to new Linux users. These two
directories, /proc and /dev have no Windows counterpart, and are
not at first glance easily understandable. They are, however,
powerful tools for understanding and using Linux.
"This article is a walk-through of the device (/dev) and process
(/proc) file systems. It will explain what they are, how they work,
and how they are used in practice..."