The Oracle listener is set up to start automatically whenever your server machine is restarted. However, when your system encounters unforeseen circumstances, or when you
have manually stopped the listener, you can restart it at the command line. To do so, use the following:
You can use Enterprise Manager to stop the listener. To do so, navigate to the Listener: listener_name page by clicking Listener on the Home page.
To shut down the listener, click Stop. You can also stop it at the command line using the following: