Oracle Database 12c Release 2 (12.2) Installation On Oracle Linux 7 (OL7)

Oracle Database 12c Release 2 (12.2) Installation On Oracle Linux 7 (OL7) : In this article we will discuss about the installation of Oracle Database 12c Release 2 (12.2) 64-bit on Oracle Linux 7 (OL7) 64-bit. The article is based on a server installation with a minimum of 2G swap space.


  • Download Software
  • Unzip Files
  • Hosts File
  • Oracle Installation Prerequisites
    • Automatic Setup
    • Manual Setup
    • Additional Setup
  • Installation
  • Post Installation

Download Software :

Download the Oracle software from OTN or MOS depending on your support status.

OTN: Oracle Universal Installations (OUI) Silent Installations

Unzip Files :


Hosts File :

The “/etc/hosts” file must contain a fully qualified name for the server.

For Examples :

[root@orakldba ~]# hostname
[root@orakldba ~]#
[root@orakldba ~]# cat /etc/hosts localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 orakldba.localdomain orakldba

Oracle Installation Prerequisites :

Perform either the Automatic Setup or the Manual Setup to complete the basic prerequisites. The Additional Setup is required for all installations.

Automatic Setup:

commands must run on root user.

yum search preinstall

yum install oracle-database-server-12cR2-preinstall.x86_64 -y

It is probably worth doing a full update as well, but this is not strictly speaking necessary.

yum update -y

Manual Setup:

If you have not used the “oracle-database-server-12cR2-preinstall” package to perform all prerequisites, you will need to manually perform the following setup tasks.

Add the following lines to the “/etc/sysctl.conf” file.

fs.file-max = 6815744
kernel.sem = 250 32000 100 128
kernel.shmmni = 4096
kernel.shmall = 1073741824
kernel.shmmax = 4398046511104
kernel.panic_on_oops = 1
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
net.ipv4.conf.all.rp_filter = 2
net.ipv4.conf.default.rp_filter = 2
fs.aio-max-nr = 1048576
net.ipv4.ip_local_port_range = 9000 65500

Then run this following commands on root user :

/sbin/sysctl -p


/sbin/sysctl -p /etc/sysctl.d/98-oracle.conf

Add the following lines to this file “/etc/security/limits.d/oracle-database-server-12cR2-preinstall.conf”.

oracle   soft    nofile     1024
oracle   hard    nofile     65536
oracle   soft    nproc      16384
oracle   hard    nproc      16384
oracle   soft    stack      10240
oracle   hard    stack      32768
oracle   hard    memlock    134217728
oracle   soft    memlock    134217728

The following packages are listed as required, including the 32-bit version of some of the packages. Many of the packages should be installed already.

yum install binutils -y
yum install compat-libcap1 -y
yum install compat-libstdc++-33 -y
yum install compat-libstdc++-33.i686 -y
yum install glibc -y
yum install glibc.i686 -y
yum install glibc-devel -y
yum install glibc-devel.i686 -y
yum install ksh -y
yum install libaio -y
yum install libaio.i686 -y
yum install libaio-devel -y
yum install libaio-devel.i686 -y
yum install libX11 -y
yum install libX11.i686 -y
yum install libXau -y
yum install libXau.i686 -y
yum install libXi -y
yum install libXi.i686 -y
yum install libXtst -y
yum install libXtst.i686 -y
yum install libgcc -y
yum install libgcc.i686 -y
yum install libstdc++ -y
yum install libstdc++.i686 -y
yum install libstdc++-devel -y
yum install libstdc++-devel.i686 -y
yum install libxcb -y
yum install libxcb.i686 -y
yum install make -y
yum install nfs-utils -y
yum install net-tools -y
yum install smartmontools -y
yum install sysstat -y
yum install unixODBC -y
yum install unixODBC-devel -y

Create the new groups and users.

groupadd -g 54321 oinstall
groupadd -g 54322 dba
groupadd -g 54323 oper

useradd -u 54321 -g oinstall -G dba,oper oracle

Set the password for the “oracle” user.

passwd oracle

Additional Setup:

The following steps must be performed, whether you did the manual or automatic setup.

Set secure Linux to disabled by editing the “/etc/selinux/config” file.


Once the change is complete, restart the server or run the following command as ‘root’ user.

setenforce Permissive

If you have the Linux firewall enabled, you will need to stop and disable it.

run this following commands on root user :

systemctl stop firewalld

systemctl disable firewalld

Create the directories in which the Oracle software will be installed.

mkdir -p /u01/app/oracle/product/
chown -R oracle:oinstall /u01
chmod -R 775 /u01

Unless you are working from the console, or using SSH tunnelling, login as root and issue the following command.

xhost + <machine-name>

Add the following lines at the end of the “/home/oracle/.bash_profile” file.

# Oracle Settings
export TMP=/tmp
export TMPDIR=$TMP
export ORACLE_HOSTNAME=orakldba.localdomain
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/
export PATH=/usr/sbin:/usr/local/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib

After settings done on .bash_profile run :

[oracle@orakldba ~]$
[oracle@orakldba ~]$ . ./.bash_profile
[oracle@orakldba ~]$


Log into the oracle user. If you are using X emulation then set the DISPLAY environmental variable.

DISPLAY=<machine-name>:0.0; export DISPLAY

Start the Oracle Universal Installer OUI by issuing the following command in the database directory.

[oracle@orakldba ~]$ cd /u01/database/
[oracle@orakldba database]$ ./runInstaller
Starting Oracle Universal Installer…
Checking Temp space: must be greater than 500 MB. Actual 5067 MB Passed
Checking swap space: must be greater than 150 MB. Actual 4095 MB Passed
Checking monitor: must be configured to display at least 256 colors. Actual 16777216 Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2020-08-09_08-17-18PM. Please wait …[oracle@orakldba database]$

Proceed with the installation of your choice :

Configure Security Updates:

Installation Option:

System Class:

Database Installation Option:

Install Type:

Typical Install Configuration:

Create Inventory:

Prerequisite Checks :


Install Product:

Execute Configuration Scripts:

[root@orakldba ~]# /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 oracle.
The execution of the script is complete.
[root@orakldba ~]#
[root@orakldba ~]#
[root@orakldba ~]#
[root@orakldba ~]# /u01/app/oracle/product/
Performing root user operation.
The following environment variables are set as:
ORACLE_HOME= /u01/app/oracle/product/
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 :

Database Configuration Assistant:


Post Installation :

Edit the “/etc/oratab” file setting the restart flag for each instance to ‘Y’.


After completed installation check database status:

[oracle@orakldba ~]$ export ORACLE_SID=ORCL
[oracle@orakldba ~]$
[oracle@orakldba ~]$ sqlplus / as sysdba
SQL*Plus: Release Production on Sun Aug 9 12:27:09 2020
Copyright (c) 1982, 2016, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release - 64bit Production
SQL> define
DEFINE _O_VERSION = "Oracle Database 12c Enterprise Edition Release - 64bit Production" (CHAR)
DEFINE _O_RELEASE = "1202000100" (CHAR)
SQL> select name, database_role, open_mode from v$database;


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