Java programmers must learn the linux Command summary, javalinux

Java programmers must learn the linux Command summary, javalinux

1. Search for files
Find/-name filename.txt find the filename.txt file under/directory by name.
Find.-name "*. xml" recursively searches for all xml files
2. check whether a program is running
Ps-ef | grep tomcat view all tomcat-related processes
3. Terminate the thread
Kill-9 19979 terminate the process with the thread number 19979
Pkill-9 terminate java processes in batches
4. view files, including hidden files
Ls-al
5. current working directory
Pwd
6. Copy an object
Cp source dest
Cp-r sourceFolder targetFolder Recursively copies the entire folder
Scp sourecFile romoteUserName @ remoteIp: remoteAddr remote copy
7. Create a directory
Mkdir newfolder
Create a file: touch test.txt
8. delete a directory
Rmdir deleteEmptyFolder Delete empty directory rm-rf deleteFile recursively delete all contents in the directory
9. Move files
Mv/temp/movefile/targetFolder
10. Heavy command
Mv oldNameFile newNameFile
11. Switch users
Su-username
12. Modify file permissions
Chmod 777 file. java // file. java permission-rwxrwxrwx, r indicates read, w indicates write, and x indicates executable
13. compressed file
Tar-czf test.tar.gz/test1/test2
Zip-r test.zip/test
14. List compressed files
Tar-tzf test.tar.gz
15. decompress the file
Tar-xvzf test.tar.gz
Upzip test.zip
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 log files
The tail-f exmaple. log // command automatically displays the new content. The screen displays only 10 lines of content (configurable ).
19. Run the command as a super Administrator
Sudo rm a.txt deletes a file as an administrator
20. view port usage
Netstat-tln | grep 8080 view port 8080 usage
21. Check which program the port belongs.
Lsof-I: 8080
22. free-m view memory usage and swap zone usage
[Root @ iZ2513wqj05Z ~] # Free-m
Total used free shared buffers cached
Mem: 3535 2454 1080 16 216 440
-/+ Buffers/cache: 1797 1737
Swap: 0 0 0
23. df-h to view the usage of each partition
[Root @ iZ2513wqj05Z ~] # Df-h
Filesystem Size Used Avail Use % Mounted on
/Dev/xvda1 20G 5.4G 14G 29%/
Devtmpfs 1.9G 0 1.9G 0%/dev
Tmpfs 1.8G 0 1.8G 0%/dev/shm
Tmpfs 1.8G 17 M 1.8G 1%/run
Tmpfs 1.8G 0 1.8G 0%/sys/fs/cgroup
24. view the size of the specified directory in du-sh.
[Root @ iZ2513wqj05Z ~] # Du-sh/mnt/online/
3.2G/mnt/online/
25. Start the tomcat Service
Enter the bin directory of tomcat
Nohup./startup. sh & tail-f ../logs/catalina. out
Analysis: nohup allows the program to run in the background and is often used together.
Tail-f ../logs/catalina. out and view tomcat startup logs.