How does linux access the device?

In Linux, devices are accessed by accessing files; because the Linux system treats all hardware devices as files, the device needs to be mounted into the system. The device corresponds to a device file. To access a device Files are access to a device.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

How does Linux access the device?

In Linux, the device is accessed by accessing files. It is to treat the device as a special file to perform operations such as reading and writing.

Because the Linux system treats all hardware devices as files, when using hardware devices such as optical drives, they must be mounted into the system. Only in this way can Linux recognize them.

This is the so-called "everything is a file" in the Linux system. All files are placed in a tree directory structure with the root directory as the root. From the perspective of Linux, any hardware device is also a file, and each of them has its own file system (file directory structure).

When using these hardware devices in a Linux system, the hardware device can only be used by us if the file directory of Linux itself and the file directory of the hardware device are combined into one. The process of combining the two into one is called "mounting".

If it is not mounted, the hardware device can be found through the graphical interface system in the Linux system, but it cannot be found through the command line.

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