Create a password file

Enable SYSDBA remote login.
Set: remote_login_passwordfile= EXCLUSIVE

If this fails, check the passwordfile as follows:

1. Ensure REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE is set in the init.ora for the database.


2. Create a password file:
Unix: $
orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=first entries=5
Windows:
C:\> orapwd file=%ORACLE_HOME%\database\pwd%ORACLE_SID% password= fist entries=5


3. . To synchronize the password for sys for normal connections and connections as sysdba connect as a sysdba user and reset the sys password:

$ sqlplus "/ as sysdba" SQL> ALTER USER SYS IDENTIFIED BY change_on_install;