29 Linux commands you must know

# Commands are instructions for the computer to perform tasks. You can use commands to shut down the computer, or list the file list of the current directory, or the contents of the current text, or display a message on the screen.

If you are a newbie and trying to use the command line interface, we have collected a variety of basic Linux commands for you to learn and help you complete various tasks in various Linux distributions. Although it is not very detailed, it is very useful for Linux beginners, ordinary users, or administrators.

##1.ls – List

ls will list the contents (files or folders) of the current working directory, just like you open a folder in the GUI to see the contents.

2.mkdir – Make Directory

##mkdir Common one New directory

3.pwd – Print Working Directory

pwd displays the current working directory

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4.cd – Change Directory

For the session currently running in the terminal, cd Sets the given folder (or directory) to the current working directory.

5.rmdir – Remove Directory

rmdir Deletes the given directory.

6.rm – Remove

##rm will remove the given For files or folders, you can use rm -r to recursively delete the folder

7.cp – Copy

cp command copies files or folders. You can use the cp -r option to copy files recursively. folder. In addition, search the backend reply of the top architect on the public account for "algorithm" to get a surprise gift package.

8.mv – MoVe

##mv command to file or folder to move. If the file or folder exists in the current working directory, you can also rename the file or folder.

9.cat – concatenate and print files

cat is used to view the contents of a file on standard output (monitor or screen).

10.tail – print TAIL (from last) >

##tail By default, the last 10 lines of a given file are displayed on the standard output. You can use tail -n N to specify that the last N lines of the file are displayed on the standard output.

11.less – print LESS

less Print file contents by page or window. Very useful and efficient when viewing large files containing large amounts of text data. You can use Ctrl F to page forward and Ctrl B to page backward.

12.grep

#grep "" at Searches the given file for the specified string. grep -i "" will ignore the case of strings when searching, while grep -r "" will search for files in the current working directory. Search recursively for the specified string.

13.Find

This command will search for files matching the conditions in the given location. You can use the -name option of find -name to perform a case-sensitive search, and find -iname Perform a case-insensitive search.

##find -iname

14.tar

##The tar command can create, view and extract tar compressed files. tar -cvf is to create the corresponding compressed file, tar -tvf to view the corresponding compression file, tar -xvf to extract the corresponding compressed file.

15.gzip

The gzip command creates and extracts gzip compressed files. You can also use gzip -d to extract compressed files.

16.unzip

#unzip for gzip documents Unzip. Before decompressing, you can use the unzip -l command to view the file contents.

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17.help

--help will list all available commands in the terminal. You can use the -h or -help option of any command to view the command. Specific usage.

18.whatis – What is this command

##whatis will be used A single line describing the given command.

19.man – Manual

man displays a man page for the given command.

20.exit

##exit is used to end the current terminal session.

21.ping

ping Pings the remote host (server) by sending data packets, which is commonly used to detect network connections and server status.

22.who – Who Is logged in

who can list the currently logged in user name .

23.su – Switch User

su is used to switch between different users. Superusers can switch to other users even without using a password.

24.uname

##uname will display important information about the system, such as kernel name, Host name, kernel version, processor type, etc., use uname -a to view all information.

25.free – Free memory

free will display the system's free memory, occupied memory, available swap memory and other information. free -m will convert the units in the result into KB, while free -g will convert into GB.

26.df – Disk space Free

df View disk usage in the file system – Used and available storage space on hard drives and other storage devices. You can use df -h to display the results in a human-readable format.

27.ps – ProcesseS

ps displays the running process of the system.

28.Top – TOP processes

The top command will display according to the CPU usage by default. For processes that occupy a large amount of space, you can use top -u to view a user's CPU usage ranking.

29.shutdown

shutdown is used to shut down the computer, and shutdown -r is used to restart the computer.

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