linux--Common Commands

Content of the lesson:

Linux system origin

Various common commands for Linux and familiarity with command parameter options:

Directory Operations Command ("jump; View your current location-absolute path; View directory contents under any path" PWD (Print working directory); ls;cd; "Create; copy? ; Move/rename? Delete, archive, compress, extract "Mkdir;cp;mvdir;rmdir;" directory Permissions "chmod)

File Operations Command ("create; copy; move/rename; Delete" VI;CP;MV;RM; "File display": Cat;more;less;head;tail; "File Permissions" CHOMD; "Statistics" WC)

Standard output/Screen/command-line commands ("clear screen" clear; "Show" echo "link" ln-s)

SOS command: ( online Help command Man;--help)

Junior Play/Lazy command-("Auto-complete command" <Tab> "" "" "")

Senior Play/Lazy command-(shell script)

Vi

Comments

1. PWD (print working directory): Print out the current directory

2, LS (list): Lists, lists

Syntax: ls [parameter] path/file name/folder name

Features: Listing information for a file or subdirectory

Parameter:-A: Displays all files, including hidden files starting with.

-L: Display file or subdirectory information in long format

-I: Displays the index (node) number of each file

-R: Display directory and subordinate subdirectory structure

-S: Sort by file size

3. CD (change directory): Changing the current directory

CD ~ CD, CD $HOME # back home directory

CD./#跳转到当前目录

Cd.. /#跳转到上层目录

4.mkdir (Make Directories): Create directory

Syntax: mkdir [parameter] directory name

Parameter:-P: When the directory is established, if the parent directory does not exist, then it can be established with subdirectories, that is, multiple multi-level catalogs can be established at one time

-M: Specify Permissions

　　　　　

Eg:mkdir-p- m Dir2/bak

5.CP (first approximation)

6.mvdir (move directory): Move directory #必须在一个文件系统

7.rmdir (remove directory): Delete directory

Syntax: rmdir [parameter] directory name

Parameter:-P: When you delete a parent directory together, there should be no other directory under the parent directory.

Eg:rmdir-p longkey/test #删除当前目录下的longkey The/test directory, and when the test directory is deleted, if there is nothing else under the parent directory Longkey, the Longkey directory is also deleted.

8.vi

Naming rules: Numbers, letters, underscores

9.CP (copy): Copy

Syntax: CP [parameter] file_1 file #复制file_1到file

CP [parameter] file_1 file_2 ... file_n directory #将文件file_1到file_n都复制到directory目录下

　　　　　CP [parameter] directory1 directory #复制目录directory1到目录directory

CP [parameter] directory1 directory2 ... directory_n directory #复制目录directory1 .... directory_n to Directory

Parameters:

10.MV (move files): Move or change an existing file or directory

Syntax: MV [parameter] file directory #移动file文件到directory目录下

mv [parameter] file_1 file_2 ... file_n directory #将文件file_1到file_n都移动到directory目录下

mv [parameter] file_1 file_2 #把文件file_1文件名字改为file_2

Parameter:-F: Disable prompt

-I: When a destination file or directory exists, prompt for overwrite

11.rm

12.cat (concatenate files and print on the standard output posted): Merge files and print output standards release

Syntax: Cat [parameter] File

Eg:cat file #显示文件内容

Cat-n 5 File #显示文件第五行内容

Cat File1 >file2 #复制file1到file2中

Cat file_1 file_2 file_n >file #将file_1到file_n文件依次粘贴到file文件中

Cat File1 >> file2 #将文件file1复制到file2文件后边

cat >file #建立简短文本文件, Ctrl+d end

13.more

Syntax: more [parameters] File

Eg: morefile #分屏显示file的内容

LS |more #查找相关目录, file

Ls-al |more #详细查找相关目录, file information

Ps-ef |more #查找相关进程信息

14.less

15.head

Syntax: Head [parameter] file

Parameter:-N number: Displays the first number line of the file

-C Number: Displays the first number characters of a file

By default, the head displays the first 10 lines of the file

16.tail

Syntax: tail [parameter] file

Parameter:-f: Causes the command to enter an infinite loop

　　　　The number after-N number:number is a byte shift, the default is 10

Line displacement after-C Number:number, default is 10

17.chomd

18.WC: File Content Statistics

Syntax: WC [parameter] File

Parameter:-C: Count bytes

-L: Count rows

-W: Count words

19.clear

20.echo

21.ln (link): Establishing a connection

Syntax: ln [parameter] Destination connection name

Parameter:-S: Establish symbolic link (soft link symbolic link)

Do not add- s parameter: create hard link

target: source file or directory

　　Function:

22.man

23.--help

27, timely interruption: Ctrl + C

Teaching Objectives:

Understand why Linux is chosen?

Familiar with the basic operation of some Linux commands

Familiar with the use of some Linux command parameter options

linux--Common Commands