What is the folder uuid in linux?

In Linux, UUID is not a folder, but a string used to uniquely identify a file system or device. Its functions are: 1. It can be used to specify the file system to be mounted, and Does not have to rely on device file names; 2. Can uniquely identify and identify a file system, useful for setting up automatic mounts in the file system table or performing other specific file system-related tasks; 3. Can be used to uniquely identify a hard drive or Other storage devices are important for selecting the correct disk when installing a system or performing backup and recovery operations.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, a UUID (Universally Unique Identifier) ​​is not a folder, but a string that uniquely identifies a file system or device. A UUID is a 32-character alphanumeric identifier that is automatically generated when a file system or device is created and remains unchanged until the file system or device is deleted.

The purpose of a UUID is to provide a reliable way to identify a file system or device to avoid problems that may arise from using traditional device file names (such as /dev/sda1). This is because the device file name may change based on changes in the hardware configuration in the system, while the UUID remains stable.

In Linux systems, UUIDs are usually associated with partitions or file systems. Each partition or file system has a unique UUID. You can view the UUID of the partition through the following command:

$ lsblk -f

$ blkid

UUID plays an important role in the following aspects:

• hang Mounting a file system: A UUID can be used to specify a file system to mount without having to rely on the device file name. This ensures that the target file system can still be mounted correctly after changing the hardware configuration.

• File system identification: Through UUID, the file system can be uniquely identified and identified. This is useful for setting up automatic mounting in file system tables (such as /etc/fstab) or performing other file system-specific tasks.

• Disk Identification: For hard drives or other storage devices, UUIDs can be used to uniquely identify them. This is important for selecting the correct disk when installing a system or for backup and recovery operations.

In short, UUID is used as a unique identifier for a file system or device in Linux, which can avoid the problems caused by using traditional device file names and provides a stable and reliable Identification method.

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