Use Jindo CLI commands to access OSS-HDFS - Object Storage Service

This topic describes how to use Jindo CLI commands to access OSS-HDFS.

Environment preparation

In the E-MapReduce (EMR) environment, JindoSDK is installed by default and can be directly used.
Note To access OSS-HDFS, create a cluster of EMR 3.44.0 or later, or EMR 5.10.0 or later.
In a non-EMR environment, install JindoSDK first. For more information, see Deploy JindoSDK in an environment other than EMR.
Note To access OSS-HDFS, deploy JindoSDK 4.6.x or later.

Commands and examples

The following section shows how to use Jindo CLI commands to access OSS-HDFS.

Upload an object
Run the following command to upload a file named examplefile.txt in the local root directory to a bucket named examplebucket:
```
jindo fs -put examplefile.txt oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/
```
Create a directory
Run the following command to create a directory named dir/ in a bucket named examplebucket:
```
jindo fs -mkdir oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/dir/
```
Query objects or directories
Run the following command to query the objects or directories in a bucket named examplebucket:
```
jindo fs -ls oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/
```
Query the sizes of objects or directories
Run the following command to query the sizes of all objects or directories in a bucket named examplebucket:
```
jindo fs -du oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/
```
Query the content of an object
Run the following command to query the content of an object named localfile.txt in a bucket named examplebucket:
```
jindo fs -cat oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/localfile.txt
```
Important The content of the queried file is displayed in plain text. If the content is encoded, use HDFS API for Java to read and decode the content.
Download an object
Run the following command to download an object named exampleobject.txt from a bucket named examplebucket to a directory named /tmp in the root directory of your computer:
```
jindo fs -get oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/exampleobject.txt  /tmp/
```
Delete directories or objects
Run the following command to delete a directory named destfolder/ and all objects in the directory from a bucket named examplebucket:
```
jindo fs -rm oss://examplebucket.cn-shanghai.oss-dls.aliyuncs.com/destfolder/
```

For more information, see Jindo CLI user guide.