/Dev and/sys/devices

 

/Dev: the directory where device files are stored. Applications can read and write these files to access the actual devices;

The/sys/devices directory is organized into hierarchies based on the Bus Type mounted to the device and stores all the devices in the system. It is the most important directory structure for file system management devices;

This is the hierarchical directory structure of kernel devices by bus type. All devices in devices are connected to a certain bus.

Find the symbolic link of each specific device, which is also part of the Linux unified device model;

/Sys/Dev has two sub-directories: block and char, which store the primary and secondary numbers of Block devices and character devices in the form of (Major: minor ), it points to

Device.