Use response files to configure Oracle software after installation. You can use the same response file created during installation to also complete postinstallation configuration.

• Using the Installation Response File for Postinstallation Configuration
  Starting with Oracle Database 12c release 2 (12.2), you can use the response file created during installation to also complete postinstallation configuration.
• Running Postinstallation Configuration Using a Response File
  Complete this procedure to run configuration assistants configuration with the -executeConfigTools command.