As discussed in the introduction, the Endeca IAS Service is a container process that runs inside Jetty Web Server.
On Windows, the Endeca IAS Service is automatically started as part of the installation process. Oracle recommends that you start and stop the service from the Microsoft Services console rather than start the script manually. You may optionally choose to start the Endeca IAS Service on Windows using the ias-service.bat script in <install path>\IAS\<version>\bin, and stop it using ias-service-shutdown.bat.
On UNIX, you run the Endeca IAS Service using the scripts in <install path>/IAS/<version>/bin. You start the service with ias-service.sh or via the inittab, and stop it with ias-service-shutdown.sh. Oracle recommends using the inittab in production environments.