12cr2 installation steps on redhat 7 in vmware

network --hostonly adapter --public ip

internet --privnet

nat

set it automatically

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cat /etc/oracle-release

uname -a

yum search oracle

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

check package information

 yum info oracle-database-server-12cR2-preinstall.x86_64

check kernel parameters

cat /etc/sysctl.conf

b. Check the security Limits:

cat /etc/security/limits.d/oracle-database-server-12cR2-preinstall.conf

check groups

 cat /etc/group

id oracle

usermod -g oinstall -G dba,oper,backupdba,racdba oracle

or

# /usr/sbin/groupadd -g 54321 oinstall

# /usr/sbin/groupadd -g 54322 dba

# /usr/sbin/groupadd -g 54323 oper

# /usr/sbin/groupadd -g 54324 backupdba

# /usr/sbin/groupadd -g 54325 dgdba

# /usr/sbin/groupadd -g 54326 kmdba

# /usr/sbin/groupadd -g 54327 asmdba

# /usr/sbin/groupadd -g 54328 asmoper

# /usr/sbin/groupadd -g 54329 asmadmin

# /usr/sbin/groupadd -g 54330 racdba

# /usr/sbin/useradd -u 54321 -g oinstall -G dba,oper,backupdba,dgdba,kmdba,asmdba,asmoper,asmadmin oracle

# passwd oracle

# cat /etc/oraInst.loc

inventory_loc=/u01/app/oraInventory

inst_group=oinstall

mkdir -p /u01/app/oraInventory

mkdir -p /u01/app/oracle/product/12.2.0.1/db_1

chown -R oracle:oinstall /u01

chmod -R 775 /u01

Set secure linux by editing the “/etc/selinux/config” file, making sure the SELINUX flag is set as follows

# cat /etc/selinux/config

SELINUX=permissive

Once the change is complete, restart the server or run the following command.

# setenforce Permissive

If we need to disable firewall in linux do the following:

# systemctl stop firewalld

# systemctl disable firewalld

Login as oracle user set the following entry in .bash_profile

# su – oracle

# cat .bash_profile

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

# User specific environment and startup programs

PATH=$PATH:$HOME/.local/bin:$HOME/bin

export PATH

export LC_ALL=C

if [ $USER = “oracle” ]; then

if [ $SHELL = “/bin/ksh” ]; then

ulimit -p 16384

ulimit -n 65536

else

ulimit -u 16384 -n 65536

fi

fi

Create an environment file for the database to be created with the following variables:

# cat /home/oracle/prod.env

# Oracle Settings

export TMP=/tmp

export TMPDIR=$TMP

export ORACLE_HOSTNAME=prod1.oracle.localdomain

export ORACLE_UNQNAME=PROD1

export ORACLE_BASE=/u01/app/oracle

export ORACLE_HOME=$ORACLE_BASE/product/12.2.0.1/db_1

export ORACLE_SID=PROD

export PATH=/usr/sbin:/usr/local/bin:$PATH

export PATH=$ORACLE_HOME/bin:$PATH

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib

export CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib

Oracle Installation:

Before starting the installation by “runInstaller” from the unzipped “linuxx64_12201_database.zip”, remember to set the display variable or “xhost +” as oracle user.

# su – oracle

#xhost +

Note:

Oracle as two options during the binary installation, first option is to install binary and create a database during the installation and the the second option is to install only the binaries. Here, we are going with the second option.

Step 1:

# pwd

/home/oracle

# unzip linuxx64_12201_database.zip

cd database

./runInstaller

Once, runInstaller is executed, the below GUI will started for Oracle 12cR2 Installation. In the first empty box provide your E-mail ID if you wish to receive updates from oracle, else uncheck and press “Next”.

id oracle

hostname

cat /etc/hosts

now use dbca to create database.