Shulou(Shulou.com)06/03 Report--

Good programmer big data tutorials share summary of HadoopHDFS operation commands

1. List all directories or files under the root directory

Hadoopfs-ls/

two。 List all directories and files under the / logs directory

Hadoopfs-ls/logs

3. List all files in the / user directory and its subdirectories (use with caution)

Hadoopfs-ls-R/user

4. Create / soft directory

Hadoopfs-mkdir/soft

5. Create a multi-level directory

Hadoopfs-mkdir-p/apps/windows/2017/01/01

6. Upload the local wordcount.jar file to the / wordcount directory

Hadoopfs-putwordcount.jar/wordcount

7. Copy the / stu/students.txt file locally

Hadoopfs-copyToLocal/stu/students.txt

8. Copy the word.txt file to the / wordcount/input/ directory

Hadoopfs-copyFromLocalword.txt/wordcount/input

9. Move the word.txt file locally to the / wordcount/input/ directory

Hadoopfs-moveFromLocalword.txt/wordcount/input/

10. Make a copy of / stu/students.txt as / stu/students.txt.bak

Hadoopfs-cp/stu/students.txt/stu/students.txt.bak

11. Copy the subdirectories or files under the / flume/tailout/ directory to the / logs directory (if this directory does not exist, it will be created)

Hadoopfs-cp/flume/tailout//logs

twelve。 Rename the / word.txt file to / words.txt

Hadoopfs-mv/word.txt/words.txt

13. Move the / words.txt file to / wordcount/input/ directory

Hadoopfs-mv/words.txt/wordcount/input/

14. Delete the / ws directory as well as subdirectories and files (use with caution)

Hadoopfs-rm-r/ws

15. Delete the a.txt file in the / wordcount/output2/ directory

Hadoopfs-rm/wordcount/output2/a.txt

16. Delete all files under the / wordcount/input/ directory

Hadoopfs-rm/wordcount/input/*

17. View the disk space usage of the HDFS cluster

Hadoopfs-df-h

18. View the contents of the / word.txt file

Hadoopfs-cat/word.txt

19. Add the contents of the name.txt file to the / wordcount/input/words.txt file

Hadoopfs-appendToFilename.txt/wordcount/words.txt

20. Dynamically view the contents of the / wordcount/input/words.txt file

Hadoopfs-tail-f/wordcount/words.txt

21. Total size of statistics / flume directory

Hadoopfs-du-s-h/flume

twenty-two。 Count the size of each subdirectory (or file) under the / flume directory respectively

Hadoopfs-du-s-h/flume/*

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