[Oracle DataBase Server 12.2 Installation on Oracle Linux 7.4]: Creating a Database Instance

Run the command:

$ dbca

Connecting to Express Manager (formerly called Enterprise Manager)

1. The server does not accept requests via http. Only works via https
   https://192.168.56.101:5500/em

2. The console now requires flash player. Chrome no longer supports flash (at least officially). Had to connect using Firefox.

$ sqlplus / as sysdba

SQL> select status from v$instance;

STATUS
------------
OPEN