How to install Oracle 18c in silent mode


installation Of Oracle 18c in silent mode

This installation is for:

Oracle Linux Server release 7.7
Oracle Database 18c Enterprise Edition Release

Disabling SELINUX:

[root@dba18 ~]# vi /etc/selinux/config
[root@dba18 ~]# cat /etc/selinux/config

Disabling the Firewall:

[root@dba18 ~]# service firewalld stop
Redirecting to /bin/systemctl stop firewalld.service
[root@dba18 ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/
Removed symlink /etc/syst
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How to Delete alert log files, Trace Files Automated in Oracle Database


Deleting  alert log files, Trace Files Automated in Oracle Database

[oracle@localhost ~]$ adrci

ADRCI: Release - Production on Tue Mar 7 10:42:16 2018

Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.

ADR base = "/u01/app/grid"
adrci> show homes
ADR Homes:
adrci> show h
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Upgrade RAC Grid and Database from 11g To 12c


Main steps:
Grid: –
1. Check all services are up and running from 11gR2 GRID_HOME
2. Perform backup of OCR, voting disk and Database.
3. Create new directory for installing 12C software on both RAC nodes.
4. Run “” to verify errors.
5. Install and upgrade GRID from 11gR2 to 12cR1
6. Verify upgrade version
Database: –
1. Backup the database before the upgrade
2. Database upgrade Pre-check
Creating Stage for 12c database software
Creating directory for 12c oracle home
Check the pre upgrade status.
3.Unzip 12c database software in stage
4Install the using the … Read more

How To Downgrade Oracle 19c Grid To 12c Grid


In the pervious article we have explained the Upgrade Grid Infrastructure 12c To 19c Oracle Now We will explain the steps for downgrade oracle 19c 2 node GRID to oracle GRID.

2 NODES – localhost1 and localhost2
Grid owner – oracle
19C ORACLE_HOME(current) – > /sharearea/crs/grid19c
12C ORACLE_HOME (old) -> /crs/app/oracle/product/grid12c

1. Check the current grid version:( check on both the nodes)

oracle@localhost1:/$ crsctl query crs softwareversion
Oracle Clusterware version on node [dbhost1] is []
oracle@localhost1:$ crsctl 
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Upgrade Grid Infrastructure 12c To 19c Oracle


The latest oracle version is oracle 19C . In the below article we will explain the steps for upgrading grid infrastructure to 19c from oracle 12c . The upgrade will be done in rolling mode.

Current configuration – >

No of nodes – 2 node
current version –
os platform – Linux
grid owner – oracle

Check software version :
oracle@node1~$ crsctl query crs activeversion
Oracle Clusterware active version on the cluster is []

oracle@node2~$ crsctl query crs softwareversion
Oracle Clusterware version on node node1 is []

2. Download the software and unzip on your first Read more