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Step 1 Edit Host Files /etc/hosts

127.0.0.1 localhost.localdomain localhost192.168.0.210 oracle_12C.localdomain oracle_12C

Step 2 Edit Kernel Parameters /etc/sysctl.conf

fs.filemax = 6815744kernel.sem = 250 32000 100 128kernel.shmmni = 4096kernel.shmall = 1073741824kernel.shmmax = 4398046511104net.core.rmem_default = 262144net.core.rmem_max = 4194304net.core.wmem_default = 262144net.core.wmem_max = 1048576fs.aiomaxnr = 1048576net.ipv4.ip_local_port_range = 9000 65500

sysctl p apply changes

Step 3 Edit Limits file etc/security/limits.conf

oracle soft nofile 1024oracle hard nofile 65536oracle soft nproc 2047oracle hard nproc 16384oracle soft stack 10240oracle hard stack 32768

Step 4 Install dependencies

yum install binutils y

yum install compatlibcap1 yyum install compatlibstdc++33 yyum install compatlibstdc++33.i686 yyum install gcc yyum install gccc++ yyum install glibc yyum install glibc.i686 yyum install glibcdevel yyum install glibcdevel.i686 yyum install ksh yyum install libgcc yyum install libgcc.i686 yyum install libstdc++ y

yum install libstdc++.i686 yyum install libstdc++devel yyum install libstdc++devel.i686 yyum install libaio yyum install libaio.i686 yyum install libaiodevel yyum install libaiodevel.i686 yyum install libXext yyum install libXext.i686 yyum install libXtst y

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yum install libXtst.i686 yyum install libX11 yyum install libX11.i686 yyum install libXau yyum install libXau.i686 yyum install libxcb yyum install libxcb.i686 yyum install libXi yyum install libXi.i686 yyum install make yyum install sysstat yyum install unixODBC yyum install unixODBCdevel y

Step 5 Add Groups and Users

groupadd g 54321 oinstallgroupadd g 54322 dbagroupadd g 54323 oper

useradd u 54321 g oinstall G dba,oper oraclepasswd oracle

Step 6 /etc/security/limits.d/90nproc.conf# Change this* soft nproc 1024

# To this* nproc 16384

Step 7 Set SELINUX

SELINUX=permissive

run the command after edit setenforce Permissive

Step 8 Stop Firewall

# service iptables stop# chkconfig iptables off

Step 9 Create directories for oracle Installation

mkdir p /oracle/product/12.1.0/db_1chown R oracle:oinstall /oraclechmod R 775 /oracle

Step 10 xhost +

Step 11 Edit bash profile for oracle user /home/oracle/.bash_profile

# Oracle Settingsexport TMP=/tmpexport TMPDIR=$TMP

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export ORACLE_HOSTNAME=oracle_12C.localdomainexport ORACLE_UNQNAME=db1export ORACLE_BASE=/oracleexport ORACLE_HOME=$ORACLE_BASE/product/12.1.0/-db_1export ORACLE_SID=db1

export PATH=/usr/sbin:$PATHexport PATH=$ORACLE_HOME/bin:$PATH

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/u-sr/libexport CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME-/rdbms/jlib

Step 12 Extract Installation Files

unzip linuxamd64_12c_database_1of2.zipunzip linuxamd64_12c_database_2of2.zip

Step 13 Start the Oracle Universal Installer

./runInstaller

Post Installation

dit the "/etc/oratab" file setting the restart flag for each instance to 'Y'

cdb1:/u01/app/oracle/product/12.1.0/db_1-:Y