Understanding /proc
Throughout my experience, many users on Linux Help Forums or IRC have had questions that require information from /proc to diagnose. And every single time, I've had to walk them through the process of using and understanding /proc so that I could help them with their problem. For that reason, I think that a brief tutorial on the basics of /proc is in order.
When it comes down to it, /proc is a filesystem. Although it does not represent any physical device, you can still mount it and unmount it as you please. It contains a multitude of valuable information regarding the processes you are running, as well as the hardware you have hooked up to your computer (although in recent years, /sys has been devised by the Kernel folks to represent the hardware hierarchy and export device information ). You can see which modules you have loaded, how long your system has been up, and the memory usage of processes on your system. In fact, every single process running has an entry, or directory, inside /proc. As you can see, /proc can be a very powerful asset. But before you can use it, you need to mount it.
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