What is the default username and password to the oracle pre-built virtual machine? 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?
The default password for the HR, sys and system accounts is oracle. 

The Unix password for the oracle user is also oracle.