By default the admin portlet displays the list of portlet applications. It shows the status of each application and provides the capability to stop or start an application.

The admin portlet showing all the portlet applications.

On the example we can see that all the applications are in started mode except the samples-basic-portlet application. It is possible to manage the life cycle of each application by clicking on the start link when it is stopped or clicking on the stop link when it is started.