[Oracle DataBase Server 12.2 Installation on Oracle Linux 7.4]: Creating a Remote Connection Service (Listener)

$ netca

Oracle 12.2 Listener installation

Oracle Net Services Configuration:
Configuring Listener:LISTENER
Listener configuration complete.
Oracle Net Listener Startup:
    Running Listener Control:
      /u01/oracle/database/12.1/bin/lsnrctl start LISTENER
    Listener Control complete.
    Listener started successfully.
Oracle Net Services configuration successful. The exit code is 0