The goal of this section is to look at various /proc/ variables and give an outline of its purpose. The proc filesystem can provide the linux user a vast array of information about the running system. This spans from kernel features to networking information. The /proc/ file system also allows the user to set some proc variables to change kernel options on the fly. Things like ip forwarding, or modifying the netfilter max tcp connection timeout can all be achieved using simple echo 1> or echo 0> commands.
List of the current proc variable information: