Quick tip:
[oracle@server ~]$ orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=$password entries=$num_users force=y
KB: http://docs.oracle.com/cd/B28359_01/server.111/b28310/dba007.htm#ADMIN12478
# OBS 1
“If you are running multiple instances of Oracle Database using Oracle Real Application Clusters, the environment variable for each instance should point to the same password file.”
# OBS 2
REMOTE_LOGIN_PASSWORDFILE need to be in EXCLUSIVE to alter user with sysdba.
# OBS 3
Users can be chacked on V$PWFILE_USERS.
# OBS 4
Entries represent the quantity of users on orapwd/with sysdba.
Matheus.