You can specify the following commands for the Listener Control utility
Changes the password on the Listener Control utility to an encrypted password. After issuing this command, the Listener Control utility prompts you for your old password (if one exists) and your new password without echoing either entry. Typically, you issue a SAVE_CONFIG command after changing the password.
Exits the Listener Control utility.
Displays a list of Listener Control utility commands.
Exits the Listener Control utility. This command is identical to the EXIT command.
Reloads the LISTENER.ORA file, so that the specifications in this configuration file are applied. In many cases, issuing RELOAD allows you to implement changes without having to stop and restart the listener.
Saves all changes made to the listener configuration to the LISTENER.ORA file.
Returns detailed information about database services, instances, dedicated servers, and dispatchers with which the listener interacts.
Allows you to set the parameter values for the listener. If you issue the command without a parameter, it will return a list of parameters that can be set.
One of the parameters from the following list:
Specifies the default listener for all subsequent Listener Control utility commands.