Why does the Linux optical drive need to be mounted?

Because the Linux system treats all hardware devices as files, when using an optical drive device, it must be mounted into the system in order for the system to recognize the optical drive device; mounting is Linux itself. The process of merging the file directory and the file directory of the hardware device into one.

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

Why should the Linux optical drive be mounted?

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 it.

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 Linux's perspective, 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".

Linux mounting method:

1. Enter: lsblk under root to view the hardware devices.

2. Create a folder under /mnt.

3. Enter: mount /dev/sdb1 /mnt/usb. This will allow you to mount it.

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.

Mounting refers to connecting the top-level directory in the device file to a directory (preferably an empty directory) under the Linux root directory. Accessing this directory is equivalent to accessing the device file.

To correct a misunderstanding, not any directory under the root directory can be used as a mount point. Since the mounting operation will hide the files in the original directory, neither the root directory nor the original directory of the system can be used as a mount point. The mount point will cause system abnormalities or even crashes. It is best to use a newly created empty directory as the mount point.

The /dev/ directory file in the root directory is responsible for all hardware device files. In fact, when the U disk is inserted into Linux, the system will indeed allocate a directory file (such as sdb1) to the U disk, which is located /dev/ directory (/dev/sdb1), but U disk data cannot be directly accessed through /dev/sdb1/. Accessing this directory will only provide you with some basic information about this device (such as capacity).

In short, when using any hardware device in the Linux system, the device file must be mounted with the existing directory file.

Comment: In short, Linux needs to start from the root directory to read files. External devices are not in the root directory, so they cannot be accessed. By mounting, external devices can be added to the root directory structure. can be accessed.

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