1:bin Directory
This directory holds all binary commands (users)
2:boot Directory
Directories required for Linux kernel and boot system programs
3:dev Directory
Directory of all device files (e.g. sound card, disk, optical drive)
4:ETC Directory
Binary installation package (YUM,RPM) configuration file default path, service startup command to store directory
5:home Directory
Home directory default data storage directory for normal users
6:lib Directory
Library file storage Directory
7:lost+found Directory
In the EXT3 system, when the system crashes unexpectedly or shuts down unexpectedly, some fragmented files are generated under this directory, and the system startup FCSK tool checks the directory and repairs the corrupted file system.
8:mnt Directory
For temporarily mounting storage devices
Linux ISO discs can normally be mounted for installation of other packages under no-network conditions
9:opt Directory
Custom Software installation directory, user-installed package storage directory.
10:proc Directory
Process and kernel information storage directory
11:root Directory
Managed Home Directory
12:sbin Directory
/sbin directory for System administrator commands (commands used by super administrators)
13:tmp Directory
Temporary file directory, temporary file storage directory generated when the program is run
14:USR Directory
Directory of System repositories (commands and Help files)
Where Usr/bin users can execute file directories (applications)
/usr/sbin directory contains software catalogs for some network management tools
15:var Directory
File directory where content changes frequently
Linux root directory structure