# Display Online Help

You can display the Hadoop Connector Reference by sending an action from your web browser. The Hadoop Connector Reference describes the actions and configuration parameters that you can use with Hadoop Connector.

For Hadoop Connector to display help, the help data file (`help.dat`) must be available in the installation folder.

To display help for Hadoop Connector

1. Start Hadoop Connector.

2. Send the following action from your web browser:

       http://host:port/action=Help

   where:

   `host` | is the IP address or name of the machine on which Hadoop Connector is installed.
   `port` | is the ACI port by which you send actions to Hadoop Connector (set by the `Port` parameter in the `[Server]` section of the configuration file).

   For example:

       http://12.3.4.56:9000/action=help

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