Pre-installation settings before installing Oracle Database 19c


If the OS is to be used for an Oracle installation, it is easier if Secure Linux (SELinux) is disabled or switched to permissive. To do this edit the “/etc/selinux/config” file, making sure the SELINUX flag is set as follows.

# vi /etc/selinux/config


If SELinux is configured after installation, the server will need a reboot for the change to take effect.


If the OS is to be used for an Oracle installation, it is easier if the firewall is disabled. This can be done by issuing the following commands from a terminal window as the “root” user.

# systemctl stop firewalld

# systemctl disable firewalld

You can install and configure it later if you wish.


Make sure the SSH daemon is started using the following commands.

# systemctl start sshd.service

# systemctl enable sshd.service

Hosts File

The “/etc/hosts” file must contain a fully qualified name for the server.       localhost localhost.localdomain localhost4 localhost4.localdomain4 oracle19c

Set the correct hostname in the “/etc/hostname” file.


Oracle Installation Prerequisites

Automatic Setup:

Install “oracle-database-preinstall-19c” package to perform all prerequisite setup. use the following command

# yum install -y

# yum install -y oracle-database-preinstall-19c

Manual Setup:

If you have not used the “oracle-database-preinstall-19c” package to perform all prerequisites, you have to manually perform the following setup tasks.

The following packages are listed as required. Don’t worry if some don’t install. It won’t prevent the installation.

#basic packages to install

# yum install -y bc binutils compat-libcap1 compat-libstdc++-33 elfutils-libelf elfutils-libelf-devel fontconfig-devel glibc glibc-devel ksh libaio libaio-devel libdtrace-ctf-devel libXrender libXrender-devel libX11 libXau libXi libXtst libgcc librdmacm-devel libstdc++ libstdc++-devel libxcb make smartmontools sysstat

#following are not available in oel8

yum install -y dtrace-modules

yum install -y dtrace-modules-headers

yum install -y dtrace-modules-provider-headers

yum install -y dtrace-utils

#(for Oracle RAC and Oracle Clusterware)

yum install -y net-tools

#(for Oracle ACFS)

yum install -y nfs-utils

#(for Oracle ACFS Remote)

yum install -y python

yum install -y python-configshell

yum install -y python-rtslib

yum install -y python-six

yum install -y targetcli

yum install libstdc* -y

yum install gcc -y

yum install gcc-c++ -y

yum install java-11-openjdk-devel

 Add the following lines to the “/etc/sysctl.conf” file, or in a file called “/etc/sysctl.d/98-oracle.conf”.

# vi /etc/sysctl.conf

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

Run one of the following commands to change the current kernel parameters, depending on which file you edited.

/sbin/sysctl -p

# Or

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

Add the following lines to a file called “/etc/security/limits.d/oracle-database-preinstall-19c.conf” file.

# vi /etc/security/limits.d/oracle-database-preinstall-19c.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

Create the new groups and users.

groupadd -g 54321 oinstall

groupadd -g 54322 dba

groupadd -g 54323 oper

groupadd -g 54324 backupdba

groupadd -g 54325 dgdba

groupadd -g 54326 kmdba

groupadd -g 54327 asmdba

groupadd -g 54328 asmoper

groupadd -g 54329 asmadmin

groupadd -g 54330 racdba

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

usermod -g oinstall -G oracle oracle

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

mkdir -p /home/app/oracle/product/19.3/dbhome_1

mkdir -p  /home/app/oradata

chown -R oracle:oinstall /home/app

chmod -R 775 /home/app/oradata

Edit .bash_profile file with oracle user,

vi .bash_profile

export ORACLE_BASE=/home/app/oracle

export ORACLE_HOME=/home/app/oracle/product/19.3/dbhome_1

export GRID_HOME=/home/app/grid

export ORACLE_UNQNAME=orcl

export ORACLE_SID=orcl


save and exit

Download Software:Download Oracle 19c database software for Linux x86-64 from Oracle cloud and copy the files to linux server (on VirtualBox) using winscp or shared folder.

You can choose “Create and configure a single instance database” option, If you want to install database software

Select Server class and Next.

Let’s go with “Enterprise Edition”:

 In next screen where we choose the Oracle base folder:

Select the directory for Oracle base. Notice that we do not have an option to select Oracle Home and it’s preselected with the directory where we have extracted software setup.

Select the type of database that you want.

Enter the Global database name and Oracle system identifier (SID)

Enable Automatic memory management or enter manually the values.

Choose the database character set from the following.

Browse the database file location for database storage and as mentioned Oracle recommends that you install data files and the Oracle database software on different disks.

Register with EM cloud if you the details or Click on Next.
Oracle Database 12c is managed by Oracle Database express by default.

Enable Recovery for your database if you want and specify the location.

Enter all accounts passwords or Use different passwords for SYS/SYSTEM accounts.

Select groups as per requirement and click NEXT.

Check the Automatically run configuration scripts or Click on Next step.

Below window will check the prerequisites for the installer.

Run the file so all prerequisite will run automatically.

 Check the installer summary and click on Install.

Run the script need to be executed as the “root” user.

Click on close.

After successful creation of database check the database status.

That’s it. Completed the Oracle database 19c Installation and creating a database.

Click to rate this post!
[Total: 0 Average: 0]