Linux Common commands-File processing commands

1. command format and directory processing command LS

Command format: command [-options] [parameters] Example: ls-la/etc (Note: Individual commands do not follow this format; when there are multiple options, they can be written together; option parameters in brackets are generally ignored)

Command name: LS

Command English original: list

Command path:/bin/ls

Execute Permissions: All Users

Function Description: Display directory file

Syntax: LS [-options] [parameters] option:-A (All) displays all files;-L (long) displays details;-D view directory properties;-H to kb,mb display file size;-I file I node.

File types and Permissions

2. Directory processing commands

Command name: mkdir

Command English original: Make directories

Command path:/bin/mkdir

Execute Permissions: All Users

Syntax: mkdir-p [directory name]

Function Description: Create a new directory-P Recursive creation example: Mkdir-p/tmp/japan/boduo

Command name: CD

Command English original: Change directory

Command path: Shell built-in command

Execute Permissions: All Users

Syntax: cd[directory]

Function Description: Switch Directory example: Cd/tmp/japan/boduo switch to the development directory CD. /go to the top level directory

Command name: pwd

Command English original: Print working directory

Command path:/bin/pwd

Execute Permissions: All Users

Syntax: pwd

Function Description: Show current directory example: PWD

Command name: rmdir

Command English original meaning: remove emtpy directories

Command path:/bin/rmdir

Execute Permissions: All Users

Syntax: rmdir [directory name]

Function Description: Delete Empty directory example: Rmdir/tmp/japan/boduo

Command name: CP

Command English Original: copy

Command path:/BIN/CP

Execute Permissions: All Users

Syntax: CP-RP [Original file or directory] (can be multiple) [target directory]-r copy directory-p reserved File property

Command name: MV

Command English Intent: move

Command path:/BIN/MV

Execute Permissions: All Users

Syntax: MV [original file or directory] [target directory]

Function Description: Cut file, rename

Command name: RM

Command English original meaning: remove

Command path:/BIN/RM

Execute Permissions: All Users

Syntax: RM-RF [file or directory]-r Delete directory-F enforcement

Command name: Touche

Command path:/bin/touch

Execute Permissions: All Users

Syntax: touch [filename]

Function Description: Create empty file Example: Touch japanlovestory.list

Command name: Cat

Command path:/bin/cat

Execute Permissions: All Users

Syntax: cat [filename]

Function Description: Display file contents-N Display line number

Command name: more

Command path:/bin/more

Execute Permissions: All Users

Syntax: more [file name] (space) or F-page (Enter) line wrap Q or Q exit

Function Description: Page shows the contents of the file

Command name: Less

directory where the command is located:/usr/bin/less

Execute Permissions: All Users
Syntax: less [filename]

Function Description: Page shows the contents of the file (can page UP) example: less/etc/services

Command name: Head

Command path:/usr/bin/head

Execute Permissions: All Users

Syntax: head [filename]

Function Description: Display the first few lines of the file-n Specify the number of rows: Head-n 20/etc/services (not write-n default display first 10 lines)

Command name: Tail

Command path:/usr/bin/tail

Execute Permissions: All Users

Syntax: tail [file name]

Function Description: Display file After a few rows-n Specify the number of rows-F dynamic Display file End Content example: Tail-n 18/etc/services

Link command

Command name: LN

Command English original meaning: link

Command path:/BIN/LN

Execute Permissions: All Users

Syntax: ln-s [Original file] [target file]-s Create soft connection

Function Description: Generate link file

Ln-s/etc/issue/tmp/issue.soft

Create a soft link to the file/etc/issue/tmp/issue.soft

Ln/etc/issue/tmp/issue.hard

Create a hard link to the file/etc/issue/tmp/issue.hard

Note: Hard links can be identified through the I node, can not cross the partition, not for the directory use; The advantage of hard link: sync with new two files, one file deleted, another file still exists

Linux Common commands-File processing commands