How to check whether the oracle database listening service is started

To check whether the Oracle database listening service is started, you can connect to the database server and query the v$listener view. The "STATUS" column in the result set will indicate the status of the listening service: "LISTENER" means started.

#How to check whether the Oracle database listening service is started?

To check whether the Oracle database listening service is started, you can follow the steps below:

1. Open the command prompt (Windows) or terminal (Mac/Linux)

• In Windows systems, press the Windows key R, type "cmd" and press Enter.
• On a Mac or Linux system, open the Terminal application.

2. Connect to the database server

• Use the following command to connect to the database server:

<code>sqlplus <username>/<password>@<hostname>:<port></code>

Where:

• <username> is the database username
• <password> is the database password
• <hostname> is the name or IP address of the database server
• <port> is the port number that the listening service listens on

3. Query the status of the listening service

• Enter the following query to check the status of the listening service:

<code>SELECT name, status FROM v$listener;</code>

4. Interpret the query results

• The "STATUS" column in the result set will indicate the status of the listening service:
• LISTENER: The listening service has been started and is listening for connections.
• CLOSED: The listening service has been closed.
• STOPPED: The listening service has stopped.
• INVALID: The listening service configuration is invalid.

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