Common Linux commands,

Common Linux commands,

Common commands

Ls display file or directory

-L list file DETAILS l (list)

-A: List all files and directories in the current directory, including hidden a (all)

Mkdir create directory

-P: Creates a directory. If no parent directory exists, p (parent) is created)

Cd switch directory

Touch creates an empty file

Echo creates a file with content.

Cat View File Content

Cp copy

Move or rename music videos

Rm delete file

-R recursively deletes sub-directories and files.

-F force Delete

Find searches for a file in the file system

Wc counts the number of rows, words, and characters in the text

Grep searches for a string in a text file.

Rmdir Delete empty directory

Tree structure display directory, you need to install the tree package

Pwd displays the current directory

Ln create link file

More and less display text file content by PAGE

Head and tail show file header and tail content

Ctrl + alt + F1 command line full screen mode

 

System Management commands

Stat displays the details of the specified file, which is more detailed than ls.

Who displays online login users

Whoami displays the current user

Hostname display Host Name

Uname: displays system information

Top dynamically displays the process information that currently consumes the most resources

Ps displays the Instantaneous Process status ps-aux

Du: view the directory size. du-h/home displays the directory information in units.

Df view disk size df-h Displays disk information in units

Ifconfig

Ping test network connection

Netstat displays network status information

The man Command won't be used anymore. Look for a man like man ls.

Clear Screen

Alias rename the command, for example, alias showmeit = "ps-aux", and unaliax showmeit

Kill to kill a process. You can view the process id with the ps or top command, and then kill the process with the kill command.

 

Compress related commands

Gzip:

Bzip2:

Tar: Package and Compression

-C. archive file

-X compressed file

-Z gzip compressed file

-J bzip2: compressed file

-V shows the compression or decompression process v (view)

-F indicates the file name.

Example:

Tar-cvf/home/abc.tar/home/abc Package only, not compressed

Package tar-zcvf/home/abc.tar.gz/home/abc and compress it with gzip

Package tar-jcvf/home/abc.tar.bz2/home/abc and compress it with bzip2

If you want to decompress the package, replace "c" in the tar-cvf/tar-zcvf/tar-jcvf command with "x.

 

Shut down/restart the machine

Shutdown

-R: shutdown and restart

-H Shutdown without restarting

Now shut down immediately

Halt Shutdown

Reboot restart

 

Use vim

Vim mode: Command mode, insert mode, and edit mode. Use ESC or I or: to switch the mode.

In command mode:

: Q exit

: Q! Force exit

: Wq save and exit

: Set number: displays the row number.

: Set nonumber hide row number

/Apache finds in the document that apache jumps to the next one by pressing n, shift + n

Copy and paste the row where the cursor is located.

H (move one character to the left), j (next line), k (last line), l (move one character to the right →)

 

File Permission Management

Three basic Permissions

The R read value is 4.

W write value is expressed as 2

X executable value is 1