ERROR:
ORA-01994: GRANT failed: password file missing or disabled
SOLUTION:
1)Log in as the same user who owns the file $ORACLE_HOME
and create the password file as follows.
$orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=password entries=5 force=y
2)Now grant sysdba privilege to the users that you need. Check V$PWFILE_USERS for the entry.
SQL>GRANT SYSDBA to SYSTEM;
3)Check the owner of $ORACLE_HOME/dbs/orapw$ORACLE_SID verify the password file,
SQL> !ls -l $ORACLE_HOME/dbs/orapw$ORACLE_SID
-rw-r—– 1 oracle oinstall 2560 Dec 24 2015 /d01/app/oracle/product/11.2.0/dbhome_1/dbs/orapwPROD1
4)If it is not to dba then change the ownership by
$chown oracle:dba $ORACLE_HOME/dbs/orapw$ORACLE_SID
Also change permission by,
$chmod 4640 $ORACLE_HOME/dbs/orapw$ORACLE_SID
