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What is lsnrctl (Listener Control) utility?
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The lsnrctl (Listener Control) utility enables a database administrator to manage one or more listeners. It cannot be used to create or configure listeners. It only provides commands to control various listener functions (such as starting and stopping listeners, getting status of listeners, etc.) and changing parameter settings in the listener.ora file (listener configuration file). Following is the basic syntax for issuing lsnrctl utility commands from the operating system command prompt:
lsnrctl Command [ListenerName]
where, ListenerName specifies the name of the listener to be administered. If the ListenerName is omitted, it is taken as LISTENER (the name of the default listener).
The lsnrctl utility commands can also be issued at the LSNRCTL> program prompt that can be obtained by issuing the lsnrctl command at the operating system command prompt. Following is the basic syntax for issuing lsnrctl utility commands from the LSNRCTL> program prompt:
Command [ListenerName]
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