How To Open The Standby Database When The Primary Is Lost in oracle11g ?

Scenario:- So this scenario shows how to open your standby database in read/write mode when you dont have any access(Lost) on primary database.
Here i'm trying to make a test case to demonstrate the following scenario.Currenly both primary and standby database are in sync.

Oracle version :-  11.2.0.1.0
Primary Database : prim
Standby Database : stand

At primary database:-
SQL> select thread#,max(sequence#) from v$archived_log group by thread#;

   THREAD# MAX(SEQUENCE#)
---------- --------------
         1             26


At standby database:-
SQL> select thread#,max(sequence#) from v$archived_log group by thread#;

   THREAD# MAX(SEQUENCE#)
---------- --------------
         1             26

So at this situation we totally power off the primary database server to test the scenario.

At primary:-
SQL> shut immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit

[root@server1 ~]# poweroff

Now at standby database:-
Open the database in mount stage.
SQL> shut immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL:> startup mount
ORACLE instance started.

Total System Global Area  413372416 bytes
Fixed Size                  2213896 bytes
Variable Size             310380536 bytes
Database Buffers           96468992 bytes
Redo Buffers                4308992 bytes
Database mounted.

SQL> SELECT OPEN_MODE,PROTECTION_MODE,DATABASE_ROLE FROM V$DATABASE;

OPEN_MODE            PROTECTION_MODE      DATABASE_ROLE
-------------------- -------------------- ----------------
MOUNTED              MAXIMUM PERFORMANCE  PHYSICAL STANDBY


Finish the Recovery process in standby database:-
SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH;

Database altered.

Once done, now activate the standby database:-
SQL> ALTER DATABASE ACTIVATE PHYSICAL STANDBY DATABASE;

Database altered.

Check the status:-
SQL> SELECT OPEN_MODE,PROTECTION_MODE,DATABASE_ROLE FROM V$DATABASE;

OPEN_MODE            PROTECTION_MODE      DATABASE_ROLE
-------------------- -------------------- ----------------
MOUNTED              MAXIMUM PERFORMANCE  PRIMARY


Now open the database in read/write mode.
SQL> ALTER DATABASE OPEN;

Database altered.

SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ WRITE

SQL> SELECT OPEN_MODE,PROTECTION_MODE,DATABASE_ROLE FROM V$DATABASE;

OPEN_MODE            PROTECTION_MODE      DATABASE_ROLE
-------------------- -------------------- ----------------
READ WRITE           MAXIMUM PERFORMANCE  PRIMARY


So, finally the previous standby database is now a new primary database with read/write mode in open stage.

How to reset Mysql Root password

How to reset Mysql Root password:-

[root@server1 ~]# mysql -u root -predhat

To change root password.
mysql> update user set Password=PASSWORD('newpassword') WHERE User='root';
Query OK, 4 rows affected (0.02 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

If root password is not available or its lost but we need to reset it, follow this.

[root@server1 ~]# service mysql stop
Shutting down MySQL..[  OK  ]
[root@server1 ~]# mysqld_safe --skip-grant-tables &
[1] 7670
[root@server1 ~]# 140222 06:06:03 mysqld_safe Logging to '/var/lib/mysql/server1.soumya.com.err'.
140222 06:06:03 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql


Now the server is running with the –skip-grant-tables flag you can connect to it without a password and reset root password:

[root@server1 ~]# mysql --user=root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> update user set Password=PASSWORD('newpassword') WHERE User='root';
Query OK, 4 rows affected (0.02 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye

Now restart the mysql service and we are good to go..
[root@server1 ~]# service mysql stop
Shutting down MySQL..[  OK  ]
[root@server1 ~]# service mysql start

[root@server1 ~]# mysql -u root -pnewpassword
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

How to find out locked & expired users in oracle 11g

SQL> select username, account_status from dba_users where lock_date is not null;

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
FLOWS_FILES                    EXPIRED & LOCKED
MDSYS                          EXPIRED & LOCKED
ORDSYS                         EXPIRED & LOCKED
EXFSYS                         EXPIRED & LOCKED
SCOTT                          EXPIRED & LOCKED
WMSYS                          EXPIRED & LOCKED
ORACLE_OCM                     EXPIRED & LOCKED
APPQOSSYS                      EXPIRED & LOCKED
XS$NULL                        EXPIRED & LOCKED
APEX_030200                    EXPIRED & LOCKED
OWBSYS_AUDIT                   EXPIRED & LOCKED

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
BI                             EXPIRED & LOCKED
PM                             EXPIRED & LOCKED
MDDATA                         EXPIRED & LOCKED
IX                             EXPIRED & LOCKED
ORDDATA                        EXPIRED & LOCKED
CTXSYS                         EXPIRED & LOCKED
ANONYMOUS                      EXPIRED & LOCKED
SH                             EXPIRED & LOCKED
OUTLN                          EXPIRED & LOCKED
DIP                            EXPIRED & LOCKED
OE                             EXPIRED & LOCKED

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
APEX_PUBLIC_USER               EXPIRED & LOCKED
HR                             EXPIRED & LOCKED
XDB                            EXPIRED & LOCKED
SPATIAL_CSW_ADMIN_USR          EXPIRED & LOCKED
SPATIAL_WFS_ADMIN_USR          EXPIRED & LOCKED
ORDPLUGINS                     EXPIRED & LOCKED
OWBSYS                         EXPIRED & LOCKED
SI_INFORMTN_SCHEMA             EXPIRED & LOCKED
OLAPSYS                        EXPIRED & LOCKED