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Table of contents
3. Specific directory description
1.Basic introduction
The Linux file system adopts a hierarchical tree directory structure. The top level of this structure is the root directory "/" , and then other directories are created under this directory.
2.Linux directory structure
3. Specific directory description
- /root: This directory is the user home directory of the system administrator , also known as the super privileged person.
- /bin: is the abbreviation of Binary. This directory stores the most commonly used commands and binary files .
- /sbin: s means Super User. The system management program used by the system administrator is stored here .
- /boot: stores some core files used when starting Linux , including some connection files and image files .
- /dev: Similar to the Windows device manager, it stores all hardware in the form of files .
- /etc: All configuration files required for system management , and the subdirectory my.conf.
- /home: stores the home directory of ordinary users . In Linux, each user has his own directory. Generally, the directory is named after the user's account.
- /var: This directory stores ever-expanding things . It is customary to place frequently modified directories in this directory, including various log files.
- /lib: Equivalent to System32 files in Windows. The most basic dynamic link shared library required for system startup , its function is similar to the DLL file in Windows. Almost all applications require these shared libraries.
- /usr: Many user applications and files are placed in this directory, similar to the program files directory under Windows.
- /usr/local: This is another directory where additional software is installed on the host . Generally, it is a program installed by compiling the source code.
- /media: The Linux system will automatically recognize some external devices , such as USB flash drives, optical drives, etc. After recognition, Linux will mount the recognized devices to this directory.
- /mnt: This directory is for users to temporarily mount other file systems. You can mount external storage on /mnt, and then enter this directory to view the contents.
- /tmp: used to store some temporary files .
- /opt: The directory where additional software is installed on the host, and the location provided for third-party software packages . If the ORACLE database is installed, it can be placed in this directory. Default is empty.
- /run: Stores real-time information and temporary files since the system is running , which will disappear after restarting.
- /selinux: is a security subsystem that controls programs to only access specific files.
- /proc: (kernel related) This directory is a virtual directory, which is a mapping of system memory . Access this directory to obtain system information.
- /srv: (kernel-related) service abbreviation. This directory stores some data that needs to be extracted after the service is started .
- /sys: (kernel related) The file system in the kernel is installed here .
- /lost+found: This directory is usually empty. When the system is shut down illegally , some files are stored here.
4.Supplement
bin, sbin, lib and lib64 are all linked under the usr folder.
A DDL file (Dynamic Linkable Library, dynamic link file) is an executable file that allows programs to share code and other resources necessary to perform special tasks.
There is a root directory "/" in the directory structure, and other directories are under "/".
All devices can be represented through files.