Sysfs
Sysfs is a virtual filesystem in Linux that exports information about devices, drivers, and kernel subsystems from the kernel to user space. It provides a hierarchical view of system hardware and configuration, allowing users and applications to query and sometimes modify device attributes through standard file operations. This filesystem is typically mounted at /sys and is essential for device management and hotplugging in modern Linux systems.
Developers should learn Sysfs when working on Linux kernel development, device driver programming, or system administration tasks that involve hardware interaction. It is crucial for debugging hardware issues, implementing hotplug support, and creating tools that monitor or configure system devices, as it offers a standardized interface to access kernel data structures without requiring direct kernel modifications.