What are the 20 most commonly used commands in Linux?

Commonly used commands in Linux include search, copy, terminate threads, create directories, delete directories, move files, switch users, etc.

There are many commonly used commands in Linux It is necessary to master it. Knowing these commands can help us solve problems better and faster. Next, I will share with you the 20 most commonly used commands in the Linux system, which have certain reference value. I hope it will be helpful to everyone

[Recommended courses ：Linux tutorial】

##1. find Find a file or directory

find / -size 204800k //Find files larger than 200MB in the root directory

find / -user username//Find files with owner username in the root directory

find / -name filename.txt //Find the filename.txt file in the / directory based on its name.

2. Copy the file including its subfiles to a custom directory

cp -r sourceFolder targetFolder

3. Check whether a program Run

ps –ef|grep tomcat //View all tomcat-related processes

4. Terminate the thread

kill -9 19979 //Terminate the thread with thread number 19979

5. View files, including hidden files

#ls -al

6. Current Working directory

pwd

7. Create directory

mkdir newfolder

8. Delete directory ( This directory is an empty directory)

rmdir deleteEmptyFolder

9. Delete the file including its sub-files

rm -rf deleteFile

10. Move files

mv /temp/movefile /targetFolder//Extended rename mv oldNameFile newNameFile

11. Switch users

su -username

12. Modify file permissions

chmod 777 file.java //Permissions of file.java -rwxrwxrwx, r means read , w means write, x means executable

13. Compressed file

tar -czf test.tar.gz /test1 /test2

14. List the compressed file list

tar -tzf test.tar.gz

15. Unzip the file

tar - xvzf test.tar.gz

16. View the first 10 lines of the file

head -n 10 example.txt

17. View 10 lines at the end of the file

tail -n 10 example.txt

18. View the log file

tail -f exmaple.log / /This command will automatically display the new content, and the screen will only display 10 lines of content (can be set).

19. Start the Vi editor

vi

20. View the current system time

date

The command will output the day of the week, month, day, time and time display format and year

Sat Feb 22 15:36:49 CST 2019

date ”%Y-% m-%d"

is displayed as follows:

[root@ming xxx]# date "%Y-%m-%d"

2019-02-22

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