[root@Ecatest1 ~]# su - oracle
[oracle@Ecatest1 ~]$ orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=oracle entries=10 force=y
[oracle@DBTest ~]$ . oraenv
ORACLE_SID = [oracle] ? orcl
[oracle@DBTest ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Tue Dec 1 15:59:37 2015

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

ERROR:
ORA-01017: invalid username/password; logon denied

Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied

Enter user-name: sys / as sysdba
Enter password: (oracle)
Connected to an idle instance.

USER is "SYS"
SQL>