Oracle database 12cR1 EE Installation on Linux 6 (RHEL 6, CentOS 6, OEL 6)
For installing Oracle 12cR1 Enterprise Edition on Linux 6 (RHEL 6, CentOS 6, OEL 6), first, you have to download the Oracle database software from the Oracle Database Software Downloads. The database software is Operating System (OS) specific and OS architecture (32-bit or 64-bit) specific.
For installing Oracle 12cR1 Enterprise Edition on Linux 6 (RHEL 6, CentOS 6, OEL 6), first, you have to download the Oracle database software from the Oracle Database Software Downloads. The database software is Operating System (OS) specific and OS architecture (32-bit or 64-bit) specific. In my case I will use a 64-bit Linux Operating System, so I will download the following files:linuxamd64_12102_database_1of2.zip and linuxamd64_12102_database_2of2.zip files. Download and unzip them into a stage directory.
When we install the Oracle 12cR1database Enterprise Edition on Linux 6, there are some manual steps to be done on the Linux level. This task could be done by using the 'oracle-rdbms-server-12cR1-preinstall' package offered by 'Oracle Public Yum' repository. The Oracle public yum repository provides a free and easiest way to install all the latest Oracle Linux dependencies automatically.
Note: My installation is tested on CentOS 6.8.
First, we have to use 'wget' command to download the appropriate yum configuration file under /etc/yum.repos.d/ directory as root user:
# cd /etc/yum.repos.d
# wget https://public-yum.oracle.com/public-yum-ol6.repo --no-check-certificate
Now to avoid a 'GPG Key' error you can download and install the GPG Key (a public key used in communication with the an Oracle server). More information you havehere.
wget https://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6 -O
/etc/pki/rpm-gpg/RPM-GPG-KEY-oracle --no-check-certificate
Now you can run the following 'yum' command (as root) to download & install all the necessary prerequisites automatically:
# yum install oracle-rdbms-server-12cR1-preinstall
This command:
- create the 'oracle' user
- create oinstall, dba groups
- install the dependencies at the Linux level
- set the proper values for Oracle 12cR1 in /etc/sysctl.conf
- set the proper values for Oracle 12cR1 in /etc/security/limits.conf
Now we have to secure the 'oracle' user:
# passwd oracle
Modify /etc/security/limits.d/90-nproc.conf
# Change this
* soft nproc 1024
# To this
* - nproc 16384
NOTE:
This will modify the default limit for number of user's processes to prevent accidental fork bombs.
Open /etc/sysconfig/network and assure you have HOSTNAME=.
In my case I have:
HOSTNAME=linux1.mydomain.com
Add your host name/ IP in the /etc/hosts .
In my case I have :
192.168.57.141 linux1 linux1.mydomain.com
One you have made modifications to the newtwork settings, you can restart the network service:
# /etc/init.d/network restart
Set SELinux to 'permissive' mode by editing the file '/etc/selinux/config'.
Create the directories and set the appropriate permissions in which the Oracle software will be installed:
# mkdir -p /u01/oracle/database/12.1.0/
# chown -R oracle:oinstall /u01
# chmod -R 775 /u01
Now, restart the server and log in as 'oracle' and start the Oracle Installer.
This will be the first page you will see:
In my case, I don't want to receive security updates. I will unmark 'I wish to receive security updates via My Oracle Support' and I will provide no email.
Click on 'Next' and you will receive the following warning:
Click on 'Yes' and you will see the 'Installation Option' screen:
You can choose 'Create and configure a database'.
Click on 'Yes' and you will see the 'Installation Option' screen:
You can choose 'Create and configure a database'.
Click on 'Next' and you will see the 'System Class' window:
I will choose 'Desktop class' because I will not install a database for production (I will not use it as a big server).
Click on 'Next' and you will see the 'Typical Installation' window:
Enter the basic database configuration: Oracle base directory, Software location, database file location, database edition, database character set (I recommend AL32UTF8), global database name, administrative password.
Click on 'Next' and the following screen will appear if this is the first oracle product installation on this machine.
Enter the Inventory Directory for this installation and oraInventory Group Name.
Click on 'Next' and a 'Prerequisite Checks' window will appear:
NOTE :
If you are using Oracle Unbreakable Enterprise Kernel, then all required kernel packages are installed as part of the Oracle Unbreakable Enterprise Kernel installation.
If all the prerequisites are ok you will see the 'Summary' window:
Click on 'Install' and the 'Install Product' window will appear:
At one moment the following screen will appear:
Run the 2 scripts as root and click on 'OK'.
The Oracle Database Configuration Assistant (DBCA) will appear and the DBCA will create the new database and will start the database instance:
When the Oracle database installation is done, you will see the following window:
Click on 'OK' and you will see the following window:
At this moment your Oracle 12cR1 database Enterprise Edition software is installed on Linux 6 (RHEL 6, CentOS 6, OEL 6)and one database instance is created.
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