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A fundamental design feature of Unix-like Operating Systems is that many of a system’s resources are accessible via the filesystem, as a file. For example the “procfs” pseudo-filesystem offers us access to all kinds of valuable treasures.
By querying files present in “/proc” you can quickly find out the intricacies of your network connections, the server’s CPU vendor and look up a mountain of useful information such as the command line parameters passed to your latest-and-greatest application when it fired up.
This is thanks to the fact that many of the functions of a server, such as a network connection are really just another stream of data and in most cases can be presented as a file on your filesystem.
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