# Introducing Hue

Hue is a Web applications that enables you to easily interact with an Hadoop cluster. Hue applications let you browse HDFS, Jobs, run Hive, Pig and Cloudera Impala queries, manage the Hive Metastore, HBase, Sqoop, ZooKeeper, MapReduce jobs, and create and schedule worklows with Oozie.

Checkout the latest updates and tutorials on http://gethue.com!

## Hue Architecture

Hue applications run in a Web browser and require no client installation.

The following figure illustrates how Hue works. Hue Server is a "container" web application that sits in between CDH and the browser. It hosts all the Hue web applications and communicates with CDH components.

## Starting Applications

To open a Hue application, click the appropriate icon in the navigation bar at the top of the Hue web browser window.

To open a second application concurrently (or a second instance of the same application), right-click the icon and select Open link in new tab.

## Displaying Help for the Hue Applications

To display the help text for a Hue application, click the Help ( ) tab in the Hue navigation bar, then click the appropriate link in the Help navigation bar at the top of the Help window.

## Logging In and Out

To log out of Hue, click Sign Out from the pull-down list under the logged-in user name (at the right of the Hue navigation bar).

## Notice of Misconfiguration

If Hue detects a misconfiguration, an indicator appears in the navigation bar at the top of the page. Clicking this indicator takes you to the Check Configuration screen which will indicate the potential misconfiguration(s) with hints about fixing them.

## Changing Your Password

You can go directly to your own information by selecting username > Profile at the right of the Hue navigation bar.

If authentication is managed by Hue (that is, authentication is not managed via some external mechanism), and you are a superuser, you can use the User Admin application to change password and personal details.

## Seeking Help, Reporting Bugs, and Providing Feedback

The Hue team strongly values your feedback. The best way to contact us is to send email to hue-user@cloudera.org.

If you're experiencing transient errors (typically an error message saying a service is down), contact your system administrator first.