Check the Services and ensure that the application service is running. For Windows, this service is Smart IT Application, when the Tomcat is in use. For Linux, this service is smartittomcat. Go to http://hostname:port/smartit/ and log on using Smart IT Administrator credentials.
hostnameis the host name or IP address of the server, and portis the port defined for the administration console during installation.
When external Tomcat is used, for Windows and Linux, this service is the service name that you have provided while installing Tomcat as a service.