2. Common Linux operation commands (1) and linux operation commands

2. Common Linux operation commands (1) and linux operation commands

BASH: It is the GNU Bourne Again Shell, which is the default Shell on the GNU operating system.

Bourne Shell: Shell developed by Bell lab.

Korn Shell: It is the development of the Bourne Shell and is compatible with the Bourne Shell in most aspects.

C Shell: It is SUN Shell's BSD version.

 

Command Format:

Command name option parameter 1 parameter 2...

 

Common directory operation commands:

1.Pwd: (Print Working Directory abbreviation, display the current Directory)

2.Cd: Change the Directory

-- Cd/to the root directory

-- Cd ~ Go to the/home/user directory

-- Cd/usr to the usr directory under the root directory ------------ absolute path

-- Cd test: Go to the test subdirectory under the current directory ------- relative path

3.Ls: View directory content

-- Ls-a lists all files in the directory, including hidden files.

-- Ls-l lists the details in the directory, including permissions, owner, group, size, and creation date.

4.Mkdir: Create a directory

5.Rmdir: Delete directory

 

Common file operation commands:

1.Touch: Create a new file

-- Touch newfile: Creates a blank file named newfile.

2.Cp: Copy an object

-- Cp <source filename> <target filename>

-- Cp newfile u01/test: copy the newfile to the u01 directory and name it test.

3.Mv: Move files

-- Mv/arch/g040_870377057.dbf u01 copy the. dbf file to the u01 folder.

-- Mm-i overwrite confirmation prompt

-- Forced mv-f coverage

-- Mv-v display file movement speed

4.Rm: Delete an object

-- Rm-r recursively deletes a directory and all its subdirectories and files.

5.Ln: Link

 

Wildcard:

?: Can replace a single character.

*: Can replace any character.

[Charset]: Can replace any single character in the charset set.

 

View files:

1.Cat: Displays the content of the entire file on the screen and merges the file.

2.More: View the content in the file. more can view the content of the file by page. It also supports direct row navigation and other functions.

-- Ls-l | more-5

Note: Press Q to exit.

3.Less: Displays large files by PAGE, similar to more

-- Less filename

4.Head: Displays the first few lines of the file. The default value is 10.

5.Tail: Displays the last few lines of the file. The default value is 10.

-- Tail-f filename monitors the tail content of the filename file (10 rows by default), for example:

-- Tail-n 20 filename: display the last 20 rows of filename.

Note: Exit by CTL + C.