The fourth shortcut from the remote desktop is the YARN application status, which provides you with details on all applications that are submitted, running, and completed. The following screenshot shows you the YARN status web page, which is available at http://headnodehost:9014/cluster:

To get the details of any particular application such as a MapReduce job, you can click on the History link, as shown in the following screenshot:

The following screenshot shows you the details of a MapReduce job, which includes status, start time, end time, number of map containers, and number of reduce containers: