Where is the Linux directory entry

Linux directory entries are in the file directory. In Linux, the file directory is used to identify the physical address of the file in the system and is provided for retrieving files. The file directory entry contains the file name and i-node number. .

#The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

Where are the Linux directory entries?

Linux files and directories, directory entries in Linux

File path                                                                 ​Path Example: /home/user/test.txt

Relative path: Starting from the current directory to the path to the target file or directory Example: Under the home path, writing uesr/test.txt cannot be written /user/test.txt

Attributes of the file
• File type

Everything under Linux is a file, ordinary files, Directory files, device files, link files, socket files, pipe files

Linux directory

represents the special directory Symbols:

1)~ represents the user’s home directory
2). represents the current directory

3).. Represents the upper-level directory

file directory: used to

identify

in the system File physical address , provided for retrieving files.

The file directory entries include:

File name

,
• i node number
• Linux directory structure (tree structure)

File System Hierarchy Standard (FHS)

• /: The starting point of the linux system directory tree bin:
Command file directory

, also called the binary directory

boot: Stores the system's

kernel files and boot loader files

dev:

Device files Directory, stores all device files, such as cdrom is a CD device

etc: stores

system configuration files, such as password files

home: contains the home directory

of each user in the system , and the subdirectory name is each user Name

lib: Stores various programming language libraries

media: The automatic mounting point set by the system, such as the automatic mounting point of a U disk

opt: Indicates optional Meaning, some

software packages will be installed here

usr: one of the largest directories. In many systems, this directory is mounted as an independent partition.

Mainly stores data that does not change frequently

, as well as the application directory installed under the system

mnt: Mainly used to

temporarily mount the file system, provided by default for some devices Mount point

proc: virtual file system, the files in this directory are images in memory

sbin: save the command file of the system administrator or root user

tmp : Store temporary files

var : Usually save frequently changing content, such as system logs, mail files, etc.

root : System administrator directory

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