I downloaded DeveloperDaysVM2016-06-02_13.ova from http://www.oracle.com/technetwork/database/enterprise-edition/databaseappdev-vm-161299.html and successfully loaded it into Virtual Box.
I logged in as "oracle" user and I can see the desktop.
From within the virtual machine, I opened Firefox and navigated to:
http://localhost:8080/ords/hrrest/employees/ and successfully received a list of employees in JSON format. So I know the database is up and running.
My only problem is I cannot login to the database.
I tried:
[oracle@vbgeneric oracle]$ sqlplus oracle
SQL*Plus: Release 12.1.0.2.0 Production on Tue Jul 5 17:32:22 2016
Copyright (c) 1982, 2014, Oracle. All rights reserved.
Enter password: oracle
ERROR:
ORA-01017: invalid username/password; logon denied
Enter user-name:
my ORACLE_SID=orcl12c
How do I login to the database itself?