OPatch detects your platform as 226 while this patch 21815758 supports platforms: 46 (Linux Intel)

 ### ERROR ###

OPatch detects your platform as 226 while this patch 21815758 supports platforms:

   46 (Linux Intel)

This patch is not suitable for this operating system.

Please contact support for the correct patch.

ERROR: OPatch failed during prerequisite check.

### SOLUTION ###

This Error Accuring when I was appling Oracle Application Security Patch 21845960 On $IAS_ORACLE_HOME (Oracle Fusion Middleware 10.1.3.5)

Before applying the patch on Linux X86-64 platform, run the following command:

46 (Linux Intel) ---- (32bit OS)

$ export OPATCH_PLATFORM_ID=46

$ opatch napply

ORA-12754: Feature 'Per-PDB TDE keystore' is disabled due to missing capability 'Engineered Systems'.

 [oracle@dbs19c pfile]$ sqlplus / as sysdba

SQL> alter session set container=pdb1;

Session altered.

SQL> show con_name

CON_NAME

------------------------------

PDB1

SQL> set lines 250 pages 250

SQL> col name format a20

SQL> SELECT name, open_mode FROM v$pdbs;

NAME                 OPEN_MODE

-------------------- ----------

PDB1                 READ WRITE

SQL> show parameter tde_configuration

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

tde_configuration                    string

SQL> alter system set TDE_CONFIGURATION="KEYSTORE_CONFIGURATION=FILE";

alter system set TDE_CONFIGURATION="KEYSTORE_CONFIGURATION=FILE"

*

ERROR at line 1:

ORA-32017: failure in updating SPFILE

ORA-12754: Feature 'Per-PDB TDE keystore' is disabled due to missing capability

'Runtime Environment'.

Note: This feature Per-PDB TDE keystore is only for cloud database & System Engineered Machine. 

SQL> show parameter _exadata

SQL> alter session set container=cdb$root;

Session altered.

SQL> alter system set "_exadata_feature_on"=true scope=spfile;

System altered.

SQL> shut immediate;

SQL> startup;

SQL> alter session set container=pdb1;

Session altered.

SQL> alter system set TDE_CONFIGURATION="KEYSTORE_CONFIGURATION=FILE";

System altered.

SQL> show parameter TDE_CONFIGURATION

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

tde_configuration                    string      KEYSTORE_CONFIGURATION=FILE

How to Create & Drop Pluggable Database in 19c Manually (Command Line)

EXAMPLES OF PLUGGABLE DATABASE CREATION & DROP 

=================================

## CREATION PLUGGABLE DATABASE ##

=================================

1) The first method uses the CREATE_FILE_DEST clause in the CREATE PLUGGABLE DATABASE statement.

CREATE PLUGGABLE DATABASE pdb2 ADMIN USER pdb_adm IDENTIFIED BY Password1 

CREATE_FILE_DEST='/u01/app/oracle/oradata';

2) The second method uses the FILE_NAME_CONVERT clause in the CREATE PLUGGABLE DATABASE statement.

CONN / AS SYSDBA

CREATE PLUGGABLE DATABASE pdb2 ADMIN USER pdb_adm IDENTIFIED BY Password1

FILE_NAME_CONVERT=('/u01/app/oracle/oradata/cdb1/pdbseed/','/u01/app/oracle/oradata/cdb1/pdb2/');

3) Alternatively, we can specify the PDB_FILE_NAME_CONVERT initialization parameter before calling the command without using the FILE_NAME_CONVERT clause.

CONN / AS SYSDBA

ALTER SESSION SET PDB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/cdb1/pdbseed/','/u01/app/oracle/oradata/cdb1/pdb3/';

CREATE PLUGGABLE DATABASE pdb3 ADMIN USER pdb_adm IDENTIFIED BY Password1;

=============================

## DROP PLUGGABLE DATABASE ##

=============================

Connect as ROOT

---------------

sqlplus / as sysdba

SHOW PDBs; 

ALTER PLUGGABLE DATABASE FURQAN CLOSE;

KEEP DATAFILES

--------------

The following statement drops the PDB pdb_name and it will remain its associated data files:

DROP PLUGGABLE DATABASE FURQAN KEEP DATAFILES;

INCLUDING DATAFILES 

-------------------

The following statement drops the PDB pdb_name and its associated data files:

DROP PLUGGABLE DATABASE FURQAN INCLUDING DATAFILES;

Source : Internet / R&D

HOW TO SET NEWNAME CLAUSE 11G R2 AND ONWORD

Important Note: Oracle Introduce New Feature "SET NEWNAME" in Oracle 11g Release 2 for RMAN Utility to Database or Datafiles. Now a days DBAs are using this feature for restoration in Non ASM to ASM Databases and RAC Databases.

Set NEWNAME Flexibility :

Suppose you are restoring datafiles from the backup, either on the same server or a different one such as staging. If the filesystem (or diskgroup) names are identical, you won’t have to change anything. But that is hardly ever the case. In staging the filesystems may be different, or perhaps you are restoring a production database to an ASM diskgroup different from where it was originally created. In that case you have to let  RMAN know the new name of the datafile. The way to do it is using the SET NEWNAME command. Here is an example, where your restored files are located on /u02 instead of /u01 where they were codeviously.

run 

{

   set newname for datafile 1 to '/u02/oradata/system_01.dbf';

   set newname for datafile 2 to '/u02/oradata/sysaux_01.dbf';

   restore database;      … 

}

Here there are just two datafiles, but what if you have hundreds or even thousands? It will not only be a herculean task to enter all that information but it will be error-prone as well. Instead of entering each datafile by name, now you can use a single set newname clause for a tablespace. Here is how you can do it:

run 

{

 set newname for tablespace examples to '/u02/examples%b.dbf';

 … 

 … rest of the commands come here … 

}

If the tablespace has more than one datafile, they will all be uniquely created. You can use this clause for the entire database as well:

run 

{   

   set newname for database to '/u02/oradata/%b'; 

}

The term %b specifies the base filename without the path, e.g. /u01/oradata/file1.dbf will be recodesented as file1.dbf in %b. This is very useful for cases where you are moving the files to a different directory. You can also use it for creating image copies where you will create the backup in a different location with the same names as the parent file which will make it easy for identification.

One caveat: Oracle Managed Files don’t have a specific basename; so this can’t be used for those. Here are some more examples of the placeholders.

%f is the absolute file number 

%U is a system generated unique name similar to the %U in backup formats

%I is the Database ID

%N is the tablespace name

Source : Internet

How to STOP and START processes in Oracle RAC and Log Directory Structure

Shutdown RAC Database

You need to Shutdown Database instances on each node. You can either use Oracle Enterprise Manager or SVRCTL to shutdown the instances. If you are using EM Grid control then set a blackout in Grid control for processes that you intend to shutdown. So that records for these processes indicate that the shutdown was planned.

Use below command to stop Enterprise Manager/Grid Control

$ORACLE_HOME/bin/emctl stop dbconsole

Use below command to shutdown all oracle RAC instances on all nodes.

$ ORACLE_HOME/bin/srvctl stop database -d db_name

Use below command to status all oracle RAC instances on all nodes.

$ ORACLE_HOME/bin/srvctl status database -d db_name

If you want to stop specific database instances use below command

$ ORACLE_HOME/bin/srvctl stop database -d db_name –i instance_name

Shutdown Oracle ASM Instance

Once the database is stopped, proceed with ASM Instance shutdown. 

Use below command to shutdown ASM instances on all nodes

$ORACLE_HOME/bin/bin/srvctl stop asm -n node

Shutdown Node applications

Use below command to shutdown node apps on all RAC nodes

$ORACLE_HOME/bin/bin/srvctl stop nodeapps -n node

Shutdown Oracle Clusterware

You need to Shutdown oracle clusterware or CRS as root and run below command on each node in the cluster.

#crsctl stop crs

Please note that using above command will stop Oracle High availability services (OHAS) and Clustware stack in a single command

From 11g R2 to onward, you can do this in two stops

1. Stop Clustwerware stack on local node

#crsctl stop cluster

You can stop the clusterware stack on all nodes in the cluster 

# Crsctl stop cluster –all

Where

-all Start clusterware on all nodes

-n Start clusterware on particular nodes

2. Stop Oracle High availability service demon on each node in the cluster.

# crsctl stop has

Check the Status of Cluster

Once all process stopped run the below command to check the status of CRSD,CSSD,EVMD process.

# crsctl check crs

If you see any process failed to stop then you can also use Force option to terminate the processes unconditionally.

$ crsctl stop crs –all –f

Start processes in Oracle RAC

Follow the reverse sequence to start all processes in oracle RAC

# crsctl start crs

$ORACLE_HOME/bin/bin/srvctl start nodeapps -n node

$ORACLE_HOME/bin/bin/srvctl start asm -n node

$ORACLE_HOME/bin/srvctl start database -d db_name

If you come across any issues during startup orshutdown, check the Oracle Clusterware Component Log Files.

Oracle Clusterware Log Directory Structure

CRS_HOME/log/hostname/crsd/ - The log files for the CRS daemon CRS_HOME/log/hostname/cssd/ - The log files for the CSS daemon 

CRS_HOME/log/hostname/evmd/ - The log files for the EVM daemon

CRS_HOME/log/hostname/client/ - The log files for the Oracle Cluster Registry (OCR) 

CRS_HOME/log/hostname/racg/ - The log files for the Oracle RAC high availability component

CRS_HOME/log/hostname/racg/ - The log files for the Oracle RAC high availability component

CRS_HOME/log/hostanme/alert.log – The alert.log for Clusterware issues.

Please note that the CRS_HOME is the directory in which the Oracle Clusterware software was installed and hostname is the name of the node

uatdb1

 srvctl start instance -d UAT -n uat-ebsdb1

uatdb2

 srvctl start instance -d UAT -n uat-ebsdb2

Source : Internet

Vulnerability : Default or Guessable SNMP community names: public (snmp-read-0001)

#### To configure SNMP Follow below mentioned Command ####

1) Backup original snmpd.conf file

[root@ebstest snmp]# mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak

2) Create a new snmpd.conf file and populate it with a single line.

[root@ebstest snmp]# touch /etc/snmp/snmpd.conf

echo "rocommunity public" > /etc/snmp/snmpd.conf   // Replace Public with any keyword like a strong Password and don't forget. 

[root@ebstest snmp]# echo "rocommunity Fu#Q@n_12-cFk-cd" > /etc/snmp/snmpd.conf

3) Restart the SNMP service.

[root@ebstest snmp]# systemctl restart snmpd.service

Error: No space left on device

[root@ebstest snmp]# systemctl status snmpd.service

● snmpd.service - Simple Network Management Protocol (SNMP) Daemon.

   Loaded: loaded (/usr/lib/systemd/system/snmpd.service; disabled; vendor preset: disabled)

   Active: active (running) since Thu 2024-01-18 11:04:55 PKT; 1s ago

 Main PID: 23311 (snmpd)

   CGroup: /system.slice/snmpd.service

           └─23311 /usr/sbin/snmpd -LS0-6d -f

Jan 18 11:04:55 ebstest.oracle.com systemd[1]: Starting Simple Network Management Protocol (SNMP) Daemon....

Jan 18 11:04:55 ebstest.oracle.com snmpd[23311]: NET-SNMP version 5.7.2

Jan 18 11:04:55 ebstest.oracle.com systemd[1]: Started Simple Network Management Protocol (SNMP) Daemon..

4) Test with snmpwalk command on local host

snmpwalk –v2c –c public localhost    // Dont forgot to change public string with configured key

[root@ebstest snmp]# snmpget -v2c -c simbadb  192.168.25.165

Oracle Multitenant Architecture Database 19c (Useful Commands)

Note: 

This Practical is containing all information about file architecture of CDB and PDB. How will start and stop database of CDB with PDB and how to connect with CDB & PDB etc... This practical will help you make understanding with 19c multitenant architecture how to work.

1- Root, named CDB$ROOT. This contains Oracle metadata and common users (sys,system etc..).

2- Seed PDB, named PDB$SEED. This is a template that can be used to create new PDBs. You can’t add or modify objects in this PDB (PDB$SEED).

3-  PDB is a pluggable database it will contain collection of objects like schemas and others objects(tablespaces etc..).

4-     Below diagrams will help you understand that difference between CDB & PDB.   

[oracle@dbs19c ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Jan 15 11:51:26 2024

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SQL> set lines 133 pages 133

SQL> desc dba_data_files;

 Name                                                                      Null?    Type

 ------------------------------------------------------------------------- -------- -------------------------------

 FILE_NAME                                                                                       VARCHAR2(513)

 FILE_ID                                                                                                NUMBER

 TABLESPACE_NAME                                                                        VARCHAR2(30)

 BYTES                                                                                                  NUMBER

 BLOCKS                                                                                             NUMBER

 STATUS                                                                                                VARCHAR2(9)

 RELATIVE_FNO                                                                       NUMBER

 AUTOEXTENSIBLE                                                                     VARCHAR2(3)

 MAXBYTES                                                                           NUMBER

 MAXBLOCKS                                                                          NUMBER

 INCREMENT_BY                                                                       NUMBER

 USER_BYTES                                                                         NUMBER

 USER_BLOCKS                                                                        NUMBER

 ONLINE_STATUS                                                                      VARCHAR2(7)

 LOST_WRITE_PROTECT                                                                 VARCHAR2(7)

SQL> col FILE_NAME format a60

SQL> select TABLESPACE_NAME,FILE_NAME from dba_data_files;

TABLESPACE_NAME                FILE_NAME

------------------------------ ------------------------------------------------------------

SYSTEM                         /u01/app/oracle/oradata/DBS19C/system01.dbf

SYSAUX                         /u01/app/oracle/oradata/DBS19C/sysaux01.dbf

UNDOTBS1                       /u01/app/oracle/oradata/DBS19C/undotbs01.dbf

USERS                          /u01/app/oracle/oradata/DBS19C/users01.dbf

SQL> create tablespace dbs19c_Tablespace_TDE datafile '/u01/app/oracle/oradata/DBS19C/tde_tbs1.dbf' size 100M;

Tablespace created.

SQL> select TABLESPACE_NAME,FILE_NAME from dba_data_files;

TABLESPACE_NAME                FILE_NAME

------------------------------ ------------------------------------------------------------

SYSTEM                         /u01/app/oracle/oradata/DBS19C/system01.dbf

SYSAUX                         /u01/app/oracle/oradata/DBS19C/sysaux01.dbf

UNDOTBS1                       /u01/app/oracle/oradata/DBS19C/undotbs01.dbf

USERS                          /u01/app/oracle/oradata/DBS19C/users01.dbf

DBS19C_TABLESPACE_TDE          /u01/app/oracle/oradata/DBS19C/tde_tbs1.dbf

SQL> create user furqan identified by hafeez default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_

create user furqan identified by hafeez default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_TABLE

            *

ERROR at line 1:

ORA-65096: invalid common user or role name

SQL> show con_name

CON_NAME

------------------------------

CDB$ROOT

SQL> alter session set container=pdb;

Session altered.

SQL> create user teddb identified by haf default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_TABL

create user teddb identified by haf default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_TABLESPAC

*

ERROR at line 1:

ORA-01109: database not open

SQL> show user

USER is "SYS"

SQL> show con_name

CON_NAME

------------------------------

PDB

SQL> alter pluggable database pdb open;

Pluggable database altered.

SQL> alter pluggable database pdb save state;

Pluggable database altered.

SQL> alter session set container=pdb;

Session altered.

SQL> create user furqan identified by hafeez default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_

create user furqan identified by hafeez default tablespace DBS19C_TABLESPACE_TDE quota unlimited on DBS19C_TABLE

*

ERROR at line 1:

ORA-00959: tablespace 'DBS19C_TABLESPACE_TDE' does not exist

SQL> select TABLESPACE_NAME,FILE_NAME from dba_data_files;

TABLESPACE_NAME                FILE_NAME

------------------------------ ------------------------------------------------------------

UNDOTBS1                       /u01/app/oracle/oradata/DBS19C/pdb/undotbs01.dbf

SYSAUX                         /u01/app/oracle/oradata/DBS19C/pdb/sysaux01.dbf

SYSTEM                         /u01/app/oracle/oradata/DBS19C/pdb/system01.dbf

USERS                          /u01/app/oracle/oradata/DBS19C/pdb/users01.dbf

SQL> col name format a10

SQL> SELECT NAME, CON_ID, DBID, CON_UID, GUID FROM V$CONTAINERS ORDER BY CON_ID;

NAME           CON_ID       DBID    CON_UID GUID

---------- ---------- ---------- ---------- --------------------------------

PDB                 3  962847719  962847719 0EA7FFC0D70E4082E0632B29018C49BE

SQL> COLUMN PDB_NAME FORMAT A15

SQL> SELECT PDB_ID, PDB_NAME, STATUS FROM DBA_PDBS ORDER BY PDB_ID;

    PDB_ID PDB_NAME        STATUS

---------- --------------- ----------

         3 PDB             NORMAL

SQL> shut immediate;

Pluggable Database closed.

SQL> SELECT PDB_ID, PDB_NAME, STATUS FROM DBA_PDBS ORDER BY PDB_ID;

SELECT PDB_ID, PDB_NAME, STATUS FROM DBA_PDBS ORDER BY PDB_ID

                                     *

ERROR at line 1:

ORA-01219: database or pluggable database not open: queries allowed on fixed tables or views only

SQL> select status from v$instance;

STATUS

------------

MOUNTED

SQL> alter pluggable database pdb open;

Pluggable database altered.

SQL>  select status from v$instance;

STATUS

------------

OPEN

SQL> alter pluggable database pdb close;

Pluggable database altered.

SQL> select status from v$instance;

STATUS

------------

MOUNTED

SQL> conn / as sysdba

Connected.

SQL> show con_name

CON_NAME

------------------------------

CDB$ROOT

SQL> shut immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup;

ORACLE instance started.

Total System Global Area 2248145928 bytes

Fixed Size                  9137160 bytes

Variable Size             503316480 bytes

Database Buffers         1728053248 bytes

Redo Buffers                7639040 bytes

Database mounted.

Database opened.

SQL> desc V$CONTAINERS

 Name                                                                      Null?    Type

 ------------------------------------------------------------------------- -------- -------------------------------------------------

 CON_ID                                                                             NUMBER

 DBID                                                                               NUMBER

 CON_UID                                                                            NUMBER

 GUID                                                                               RAW(16)

 NAME                                                                               VARCHAR2(128)

 OPEN_MODE                                                                          VARCHAR2(10)

 RESTRICTED                                                                         VARCHAR2(3)

 OPEN_TIME                                                                          TIMESTAMP(3) WITH TIME ZONE

 CREATE_SCN                                                                         NUMBER

 TOTAL_SIZE                                                                         NUMBER

 BLOCK_SIZE                                                                         NUMBER

 RECOVERY_STATUS                                                                    VARCHAR2(8)

 SNAPSHOT_PARENT_CON_ID                                                             NUMBER

 APPLICATION_ROOT                                                                   VARCHAR2(3)

 APPLICATION_PDB                                                                    VARCHAR2(3)

 APPLICATION_SEED                                                                   VARCHAR2(3)

 APPLICATION_ROOT_CON_ID                                                            NUMBER

 APPLICATION_ROOT_CLONE                                                             VARCHAR2(3)

 PROXY_PDB                                                                          VARCHAR2(3)

 LOCAL_UNDO                                                                         NUMBER

 UNDO_SCN                                                                           NUMBER

 UNDO_TIMESTAMP                                                                     DATE

 CREATION_TIME                                                                      DATE

 PDB_COUNT                                                                          NUMBER

 AUDIT_FILES_SIZE                                                                   NUMBER

 MAX_SIZE                                                                           NUMBER

 MAX_DIAGNOSTICS_SIZE                                                               NUMBER

 MAX_AUDIT_SIZE                                                                     NUMBER

 LAST_CHANGED_BY                                                                    VARCHAR2(11)

 MEMBER_CDB                                                                         VARCHAR2(3)

 TENANT_ID                                                                          VARCHAR2(256)

 UPGRADE_LEVEL                                                                      NUMBER

 GUID_BASE64                                                                        VARCHAR2(30)

SQL> desc DBA_PDBS

 Name                                                                      Null?    Type

 ------------------------------------------------------------------------- -------- -------------------------------------------------

 PDB_ID                                                                    NOT NULL NUMBER

 PDB_NAME                                                                  NOT NULL VARCHAR2(128)

 DBID                                                                      NOT NULL NUMBER

 CON_UID                                                                   NOT NULL NUMBER

 GUID                                                                               RAW(16)

 STATUS                                                                             VARCHAR2(10)

 CREATION_SCN                                                                       NUMBER

 VSN                                                                                NUMBER

 LOGGING                                                                            VARCHAR2(9)

 FORCE_LOGGING                                                                      VARCHAR2(39)

 FORCE_NOLOGGING                                                                    VARCHAR2(3)

 APPLICATION_ROOT                                                                   VARCHAR2(3)

 APPLICATION_PDB                                                                    VARCHAR2(3)

 APPLICATION_SEED                                                                   VARCHAR2(3)

 APPLICATION_ROOT_CON_ID                                                            NUMBER

 IS_PROXY_PDB                                                                       VARCHAR2(3)

 CON_ID                                                                    NOT NULL NUMBER

 UPGRADE_PRIORITY                                                                   NUMBER

 APPLICATION_CLONE                                                                  VARCHAR2(3)

 FOREIGN_CDB_DBID                                                                   NUMBER

 UNPLUG_SCN                                                                         NUMBER

 FOREIGN_PDB_ID                                                                     NUMBER

 CREATION_TIME                                                             NOT NULL DATE

 REFRESH_MODE                                                                       VARCHAR2(6)

 REFRESH_INTERVAL                                                                   NUMBER

 TEMPLATE                                                                           VARCHAR2(3)

 LAST_REFRESH_SCN                                                                   NUMBER

 TENANT_ID                                                                          VARCHAR2(255)

 SNAPSHOT_MODE                                                                      VARCHAR2(6)

 SNAPSHOT_INTERVAL                                                                  NUMBER

 CREDENTIAL_NAME                                                                    VARCHAR2(262)

SQL> alter session set container=pdb;

Session altered.

SQL> show con_name

CON_NAME

------------------------------

PDB

SQL> ALTER SESSION SET container=CDB$ROOT;

Session altered.

SQL> ALTER SESSION SET CONTAINER=PDB$SEED;

Session altered.

SQL> SHOW CON_NAME

CON_NAME

------------------------------

PDB$SEED

SQL> SELECT name, pdb FROM v$services;

no rows selected

SQL> ALTER SESSION SET CONTAINER=PDB;

Session altered.

SQL> COL PDB FORMAT A15

SQL> SELECT name, pdb FROM v$services;

NAME       PDB

---------- ---------------

pdb        PDB

SQL> ALTER SESSION SET CONTAINER=PDB$SEED;

Session altered.

SQL> SELECT name, pdb FROM v$services;

no rows selected

SQL> ALTER SESSION SET CONTAINER=CDB$ROOT;

Session altered.

SQL> COL NAME FORMAT A25

SQL> SELECT name, pdb FROM v$services;

NAME                      PDB

------------------------- ---------------

dbs19cXDB                 CDB$ROOT

dbs19c.hinopak.com        CDB$ROOT

pdb                       PDB

SYS$BACKGROUND            CDB$ROOT

SYS$USERS                 CDB$ROOT

SQL> show con_name

CON_NAME

------------------------------

CDB$ROOT

SQL> alter session set container=pdb;

Session altered.

SQL> alter pluggable database close;

Pluggable database altered.

SQL> startup;

Pluggable Database opened.

SQL> shut immediate;

Pluggable Database closed.

SQL>  alter pluggable database open;

Pluggable database altered.

SQL> alter pluggable database pdb save state;

Pluggable database altered.

SQL> alter session set container=CDB$ROOT;

Session altered.

SQL> shut immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup;

SQL> ORACLE instance started.

Total System Global Area 2248145928 bytes

Fixed Size                  9137160 bytes

Variable Size             503316480 bytes

Database Buffers         1728053248 bytes

Redo Buffers                7639040 bytes

Database mounted.

Database opened.

SQL> alter session set container=pdb;

Session altered.

SQL> select status from v$instance;

STATUS

------------

OPEN

SQL> show con_name

CON_NAME

------------------------------

PDB

SQL> SELECT SYS_CONTEXT('USERENV', 'CON_NAME')FROM dual;

SYS_CONTEXT('USERENV','CON_NAME')

---------------------------------

PDB

SQL> COLUMN name FORMAT A30

SQL> SELECT name, open_mode, recovery_status FROM v$pdbs ORDER BY 1;

NAME                           OPEN_MODE  RECOVERY

------------------------------ ---------- --------

PDB                            READ WRITE ENABLED

SQL> show con_name

CON_NAME

------------------------------

PDB

SQL> conn / as sysdba

Connected.

SQL> show con_name

CON_NAME

------------------------------

CDB$ROOT

SQL> COLUMN name FORMAT A30

SQL> SELECT name, open_mode, recovery_status FROM v$pdbs ORDER BY 1 ;

NAME                           OPEN_MODE  RECOVERY

------------------------------ ---------- --------

PDB                            READ WRITE ENABLED

PDB$SEED                       READ ONLY  ENABLED

SQL> show parameter control_files

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

control_files                        string      /u01/app/oracle/oradata/DBS19C/control01.ctl,                                                                                        /u01/app/oracle/fast_recovery_area/DBS19C/control02.ctl

SQL> alter session set container=pdb;

Session altered.

SQL> show parameter control_files

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

control_files                        string      /u01/app/oracle/oradata/DBS19C/control01.ctl,                                                                                           /u01/app/oracle/fast_recovery_area/DBS19C/control02.ctl

SQL> desc v$logfile;

 Name                                                                      Null?    Type

 ------------------------------------------------------------------------- -------- -------------------------------------------------

 GROUP#                                                                             NUMBER

 STATUS                                                                             VARCHAR2(7)

 TYPE                                                                               VARCHAR2(7)

 MEMBER                                                                             VARCHAR2(513)

 IS_RECOVERY_DEST_FILE                                                              VARCHAR2(3)

 CON_ID                                                                             NUMBER

SQL> show con_name

CON_NAME

------------------------------

PDB

SQL> col MEMBER format a60

SQL> select GROUP#,STATUS,MEMBER from  v$logfile;

    GROUP# STATUS  MEMBER

---------- ------- ------------------------------------------------------------

         3         /u01/app/oracle/oradata/DBS19C/redo03.log

         2         /u01/app/oracle/oradata/DBS19C/redo02.log

         1         /u01/app/oracle/oradata/DBS19C/redo01.log

SQL> show parameter undo

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

temp_undo_enabled                    boolean     FALSE

undo_management                      string      AUTO

undo_retention                       integer     900

undo_tablespace                      string      UNDOTBS1