No listening service after Oracle is installed

After Oracle is installed, a database is created and no listening service is found. You can solve this problem by using the following method.

Run Net Configuration Assistant and select Add Listener Configuration

Configuration items are simple. You can complete the next step and configure the service name in the net manager.

In addition, the oracle installation directory \ product \ 10.2.0 \ db_1 \ NETWORK \ ADMIN contains three files: sqlnet. ora, tnsnames. ora, listener. ora

The listener content and service name are set respectively. After the preceding configuration is complete, these files will be modified. Therefore, you can manually modify these files.