Sysfs is a Linux filesystem, normally mounted on /sys, which provides information about hardware and kernel components.

The Linux sysfs filesystem, normally mounted on /sys, is a communication interface between applications and the kernel. It provides information about kernel components, and through the kernel about hardware. Some entries in /sys are writable, allowing configuration and software-initiated events such as shutting down some components. It was created as a companion to , which focuses on process-related information.

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