How to resolve the issue of no response when starting lsnrctl in Oracle?

There could be a few reasons why the command “lsnrctl start” is not responsive in Oracle.

1. The target listener is already running, so there is no need to start it again.
2. Verify if you have enough authority to execute the lsnrctl start command.
3. Check the listener configuration file (usually listener.ora) to ensure that the configuration is correct.
4. Check if the port is being used by another process, preventing the listener from starting.
5. Check the listener log file for any error messages to identify the issue.

If the above methods fail to solve the issue, you can try restarting the computer or restarting the Oracle service to attempt to resolve the problem. If the issue persists, it is recommended to contact Oracle technical support for further assistance.