Common operations commands for HDFS

0. Hadoop fs in most cases and HDFs DFS common

1. Create a directory:

Hadoop Fs–mkdir/user

2. Upload the file:

Hadoop fs–put Xx.txt/user

3. List all files in the file directory:

Hadoop fs–ls/ (/No less, no files will be found)

4. View the contents of the file (cannot be a folder)

Hadoop fs–cat/user/a/input/file01

5. Delete the specified file:

Hadoop fs–rm/user/a/input/file01

6. Recursively delete files and directories:

Hadoop fs–rmr/user/a/input/file01

7. Format HDFs:

HDFs Namenode–format

8. Start HDFs:

sbin/start-dfs.sh

9. Close HDFs:

sbin/stop-dfs.sh

10. Copy:

Hadoop fs–cp/user/a/input/file01/user/a/input/file02 [...]

11. show file or folder size

Hadoop fs–du/user/a/input/

12. Display File size

Hadoop fs–dus/user/a/input/file01

13. Recursively lists all files and folders under the file directory

Hadoop fs–ls-r/ (/No less, no files will be found)

14. Move from the original path to the target path (rename)

Hadoop fs–mv/user/a/input/file01/user/a/input/file03

15. Returns statistics for the specified path

Hadoop Fs–stat/user

16. Exit Safe Mode

HDFs Dfsadmin–safemode Leave

Common operations commands for HDFS