Introduction to Linux File system

This post introduces the filesystem of Linux, as the Linux Standards Board has developed a filesystem standard FHS, a filesystem-level standard that specifies which directories the Linux distribution should create to store specific types of files.

The root directory is recorded as/

First Level directory:

/boot: System boot related files, such as kernel, INITRD, and Grub (bootloader)

/dev: Device files

Block device files: Random access devices, accessed in blocks

Character device Ask Price: sequential access to device, accessed in character units

Main device number (major), secondary device number (minor)

/etc: Configuration file

Home directory for users, the home directory of each user defaults to/home/username

/root: Administrator's home directory

/lib: library file directory

. A: Static library files

. So: Dynamic library file (shared object)

/lib/modules: Kernel Module directory

/include: Header file directory

/media: mount point directory, mobile device

/MNT: mount point directory, additional temporary file system

/OPT: Optional directory, installation path for third-party software

/proc: Pseudo file system, kernel mapping file

/sys: Pseudo file system, property mapping file related to hardware device

/tmp: Temp file/var/tmp

/var: variable file

Related to System startup:

/bin: Executable file, user command

/sbin: Managing Commands

Related to normal operation after system startup:

/usr:universal, GKFX, read-only

/usr/bin

/usr/sbin

/usr/lib

/usr/include

Related to third-party software:

/usr/local

/usr/local/bin

/usr/local/sbin

/usr/local/lib

/usr/local/include

File directory naming rules:

1, the length can not exceed 255 characters;

2. Cannot include/;

3, strictly case-sensitive.

Introduction to Linux File system