Common commands of the HDFS client

Install a client. For details, see Installing a Client.
Log in to the node where the client is installed as the client installation user.
Run the following command to go to the client installation directory:

cd /opt/client
Run the following command to configure environment variables:

source bigdata_env
If the cluster is in security mode, run the following command to authenticate the user. In normal mode, user authentication is not required.

kinit Component service user
Run the HDFS Shell command. Example:

hdfs dfs -ls /

The following table lists common HDFS client commands.

**Table 1** Common HDFS client commands
Command	Description	Example
hdfs dfs -mkdir Folder name	Used to create a folder.	hdfs dfs -mkdir /tmp/mydir
hdfs dfs -ls Folder name	Used to view a folder.	hdfs dfs -ls /tmp
hdfs dfs -put Local file on the client node Specified HDFS path	Used to upload a local file to a specified HDFS path.	hdfs dfs -put /opt/test.txt /tmp Upload the /opt/test.txt file on the client node to the /tmp directory of HDFS.
hdfs dfs -get Specified file on HDFS Specified path on the client node	Used to download the HDFS file to the specified local path.	hdfs dfs -get /tmp/test.txt /opt/ Download the /tmp/test.txt file on HDFS to the /opt path on the client node.
hdfs dfs -rm -r -f Specified folder on HDFS	Used to delete a folder.	hdfs dfs -rm -r -f /tmp/mydir
hdfs dfs -chmod Permission parameter File directory	Used to configure the HDFS directory permission for a user.	hdfs dfs -chmod 700 /tmp/test