Introducing Hue =============== Hue is a set of web applications that enable you to interact with a CDH cluster. Hue applications let you browse HDFS, manage a Hive metastore, and run Hive and Cloudera Impala queries, HBase and Sqoop commands, Pig scripts, MapReduce jobs, and Oozie workflows. 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. \ ![image](images/huearch.jpg)\ Starting Applications --------------------- To open a Hue application, click the appropriate icon in the navigation bar at the top of the Hue web browser window:\ ![image](images/applications.png)\ 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** ( ![image](images/icon_help_24.png) ) 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 ![image](images/misconfiguration.png) appears in the navigation bar at the top of the page. Clicking this indicator takes you to the [Check Configuration](hue2.0ug_topic_3.html#topic_3__li_h1j_fhk_zj) 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](hue2.0ug_topic_11.html#topic_11) 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](mailto:hue-user@cloudera.org). If you're experiencing transient errors (typically an error message saying a service is down), contact your system administrator first.