How to Install Oracle Database 12c Release 2 in Linux 7

Oracle Database is an object-relational database management system (RDBMS) developed by Oracle Corporation. The Oracle Database 12c is a high-performance, enterprise-class database. Oracle Database is the most popular, trusted database systems. Oracle Database support multiple operating systems like Redhat, SUSE, Oracle Linux, Microsoft Windows and IBM Linux.

oracle 12c database

In this article we will explain how to install Oracle Database 12c on Linux Server.

Step 1: Prerequisites

First we need to install the required packages. These packages we can easily get from OS officially repository.

# yum install -y binutils.x86_64 compat-libcap1.x86_64 gcc.x86_64 gcc-c++.x86_64 glibc.i686 glibc.x86_64 glibc-devel.i686 glibc-devel.x86_64 ksh compat-libstdc++-33 libaio.i686 libaio.x86_64 libaio-devel.i686 libaio-devel.x86_64 libgcc.i686 libgcc.x86_64 libstdc++.i686 libstdc++.x86_64 libstdc++-devel.i686 libstdc++-devel.x86_64 libXi.i686 libXi.x86_64 libXtst.i686 libXtst.x86_64 make.x86_64 sysstat.x86_64 zip unzip

Host File:
The host file must contain a fully qualified name for the server. oracle oracle

Set secure Linux to permissive using selinux configuration file.

# vim /etc/sysconfig/selinx

Change the parameters.


Reboot the server or execute the mention command.

# setenforce Permissive

If on server Linux firewall is enabled, so you need to stop it and need to configrure it.

For CentOS/RHEL 7
# systemctl stop firewalld
# systemctl disable firewalld
For CentOS/RHEL 6
# service iptables stop
# chkconfig iptables off

Step 2: Create User and Group

Oracle database will run with normal Linux user. So we need to create the user and group for oracle.

# groupadd oinstall
# groupadd dba
# useradd -g oinstall -G dba oracle

Set the oracle user password.

# passwd oracle

Step 3: Kernel Parameters

Now we need to configure our system before start the installation of Oracle Database. Add mention kernel parameters in sysctl.conf file.

# vim /etc/sysctl.conf

Add the mention lines.

fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 8329226240
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586

Reload the configuration file to reflect the changes.

# sysctl -p
# sysctl -a

Next, we need to configure some limits for the oracle user.

# vim /etc/security/limits.conf
oracle   soft   nproc    2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
oracle soft stack 10240
oracle hard stack 32768

Step 4: Configure X11 Forwarding

X11 forwarding refers to executing such a program remotely through an SSH (Secure Shell) connection. With X11 you can easily install the Oracle Database. You can use mention link to configrure X11 on server.

X11 Configuration

Step 5: Create the Directories

Before installing Oracle Database, create directories that will be used during the Oracle installation, and provide the required permissions.

# mkdir /u01
# chown -R oracle:oinstall /u01
# chmod -R 775 /u01
# chmod g+s /u01

Step 6: Extract the File

Once you will download the Oracle database setup from Oracle official website. Extract the Oracle files on a Linux server.

# cd /software
# unzip

Step 7: Install Oracle Database

Start the Oracle Database Installer issuing the following command in the database directory.

# cd /software/database
# ./runInstaller
Oracle Install 1

Provide your email address to be informed of security issues and click “Enter”

Oracle Install 2

If you are using any proxy server then provide the details of proxy server and click “Continue”

Oracle Install 3

Choose create and configure a database option and click “Next”

Oracle Install 4

Under the ‘System Class’ section, choose system class and click “Next” again.

Oracle Install 5

In this section, Select the type of installation you want to select and click “Next”

Oracle Install 6

Select the installation type and click “Next”

Oracle Install 7

Now specify full database installation with basic configuration and click “Next”

Oracle Install 8

You are starting your first installation on the host. Specify a directory for Installation metadata files and click “Next”

Oracle Install 9

Verify that the installation pre-checks are completed without errors. then it will show the summary of the information such as global settings, database information, etc. Review the information and click “install”.

Oracle Install 10

Now installation of Oracle Database has been started. It will take a few minutes to complete.

Oracle Install 11

During the installation you need to run a couple of scripts to set the required permissions.

Oracle Install 11
# /u01/app/oraInventory/
Changing permissions of /u01/app/oraInventory.
Adding read,write permissions for group.
Removing read,write,execute permissions for world.

Changing groupname of /u01/app/oraInventory to oinstall.
The execution of the script is complete.
# /u01/app/oracle/product/11.2.0/dbhome_1/
Performing root user operation.
The following environment variables are set as:
ORACLE_HOME= /u01/app/oracle/product/11.2.0/dbhome_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin …
Copying oraenv to /usr/local/bin …
Copying coraenv to /usr/local/bin …
Creating /etc/oratab file…
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
Do you want to setup Oracle Trace File Analyzer (TFA) now ? yes|[no] :
Oracle Trace File Analyzer (TFA - User Mode) is available at :
Oracle Trace File Analyzer (TFA - Daemon Mode) can be installed by running this script :

Oracle database configuration has been completed and click “Next”.

Oracle Install 13
Oracle Install 14

Step 8: Access Oracle Enterprise Manager

When it is finished, you will be presented with the message indicating the URL of the Oracle Enterprise Manager:

Step 10: Set Oracle Home Directory

Add the following lines in user home directory at .bash_profile file.

# su - oracle
# vim .bashrc
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/12.1.0/dbhome_1; export ORACLE_HOME
ORACLE_SID=techoism; export ORACLE_SID
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib:/usr/lib64; export LD_LIBRARY_PATH

Execute the mention command.

# source .bash_profile

Step 11: Listener File Configuration

Finally replace the host in listener.ora file.

# vim $ORACLE_HOME/network/admin/listener.ora

Find below parameter.


Change the parameter with


Step 12: Enabling Oracle to Start on System Boot

To enable the database service to start automatically on boot, create the service file for oracle database and add the mention lines.

# vim /etc/systemd/system/oracle-rdbms.service
#Invoking Oracle scripts to start/shutdown Instances defined in /etc/oratab #and starts Listener

Description=Oracle Database(s) and Listener

ExecStart=/u01/app/oracle/product/12.2.0/dbhome_1/bin/dbstart /u01/app/oracle/product/12.2.0/dbhome_1
ExecStop=/u01/app/oracle/product/12.2.0/dbhome_1/bin/dbshut /u01/app/oracle/product/12.2.0/dbhome_1


Finally, indicate to database to be brought up during boot.

# vim /etc/oratab

Find the mention line.


Replace ‘N’ with ‘Y’.


Reference: Know more about Oracle 12c Database

Enjoy it!

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