Summary of Linux commands (i)

1) PWD: Show working directory path

Grammar:

PWD [Options]

Options:

The output link path when the-l directory is linked

-P Output Physical path

Example:

[Email protected] ~]# pwd

/root

Show current Path

2) CD: Change the working directory path

Grammar:

CD [options] [path]

Options:

-P If it is a connection path, enter the source physical path of the connection path

Example:

[Email protected] ~]# Cd/home

[Email protected] home]# pwd

/home

Switch to Home path

3) LS: Lists directory and file information

Grammar:

ls [options] [directory | file]

Options:

-a displays all subdirectories and files in the specified directory, including hidden files

-D If the parameter is a directory, only the period name is displayed and not the files and subdirectories below it

-F Display File types

-I displays the inode number of the file

-l display file details in long format

-R Reverse Order

-T Sort by modified time

-s sort by file size

Example:

[Email protected] data]# Ls/root

Anaconda-ks.cfg Install.log Install.log.syslog

Displays directories and files under the/root directory

4) Touch: Create an empty file, update the file timestamp

If the file does not exist, create a new file;

If the file exists, it changes the time stamp information such as the access time of the file atime.

Grammar:

touch [Options] [file]

Options:

-A Change access time only (Atime)

-M change file modification time record (mtime)

-C do not create a new file if the destination file does not exist

Example:

[[email protected] data]# touch/data/test{1..30}

[Email protected] data]# Ls/data

Test1 test12 test15 test18 test20 test23 test26 test29 test4 test7

Test10 test13 test16 test19 test21 test24 test27 test3 test5 test8

test11 test14 test17 test2 test22 test25 test28 test30 test6 test9

Create multiple contiguous files

5) mkdir: Create directory

Grammar:

mkdir [Options] [contents]

Options:

-p recursion to create a directory, the general first level directory does not exist when using-p, otherwise error

-V Displays information each time the directory is created

Example:

[Email protected] data]# mkdir-v/testdir

mkdir:created directory '/testdir '

Create a folder and display information

[Email protected] data]# mkdir-p/a/b/c/

[Email protected] data]# tree/a

/A

└──b

└──c

2 directories, 0 files

To create a folder recursively

6) RmDir: Delete Empty directory

Grammar:

rmdir [Options] [contents]

Options:

-p recursively deletes the directory and is deleted when its parent directory is empty after the subdirectory is deleted

-V Output Processing directory information

Example:

[Email protected] data]# mkdir-p/a/b/c/

[Email protected] data]# rmdir-pv/a/b/c/

rmdir:removing directory, '/a/b/c/'

rmdir:removing directory, '/a/b '

Rmdir:removing directory, '/a '

Rmdir:removing directory, '/'

rmdir:failed to remove directory '/': Device or resource busy

7) CP: Copy Files and directories

Grammar:

CP [Options] [Source file | directory] [target file | directory]

Options:

-A is equivalent to-DPR, preserving links, file attributes, and recursively replicating directories when replicating directories

-R recursively copy all subdirectories and files under directory

-F Force Delete, do not require user to confirm

-I require the user to go to the person before the operation

-L do not copy, just link file

Example:

[Email protected] data]# cp-r/boot/data

8) MV: Move file and directory paths, file and directory renaming

Grammar:

MV [options] [Source Files | directory] [target file | directory]

Options:

-I ask before overwriting

-F do not ask before overwriting

-N does not overwrite existing files

Example:

[Email protected] data]# MV/DATA/TEST1/DATA/TEST3

Test1 renamed to Test3

9) RM: Delete files or directories

Grammar:

RM [Options] [file | directory]

Options:

-F Force Delete

-R Recursively Delete directories and contents

-I need to confirm before deleting

Example:

[Email protected] data]# Ls/data

Boot Test2 test3

[Email protected] data]# rm-r/data/test2

Rm:remove directory '/data/test2 '? Y

[Email protected] data]# Ls/data

Boot Test3

WC: Number of rows, words, bytes, and characters of the statistics file

Grammar:

WC [Options] [file]

Options:

-L count rows

-W statistical number of words

-C Statistics byte number

-M statistic character number

The length of the longest line in the-l statistic file

Example:

[Email protected] data]# ls/root|wc-l

3

Shows the total number of directories and files under root and is 3

Summary of Linux commands (i)