Install Oracle 11G Release 2 (11.2) on Centos Linux 7

This article presents how to install Oracle 11G on Centos Linux 7.

Read following article how to install Centos Linux 7: Install Centos Linux 7 (for comfort set 2G memory for your virtual machine before proceeding with Oracle software installation).

Installation software is available on OTN, edelivery version 11.2.0.1 or Oracle support(old metalink) 11.2.0.4. In this installation I’m presenting installation for 11.2.0.4 but for previous version 11.2.0.X it shouldn’t be different.

Database software – 11.2.0.4

p13390677_112040_Linux-x86-64_1of7.zip

p13390677_112040_Linux-x86-64_2of7.zip

OS configuration and preparation

OS configuration is executed as root. To login as root just execute following command in terminal.

su - root

Add groups

--required groups

/usr/sbin/groupadd -g 501 oinstall

/usr/sbin/groupadd -g 502 dba

/usr/sbin/groupadd -g 503 oper

Add user Oracle

/usr/sbin/useradd -u 502 -g oinstall -G dba,oper oracle

Change password for user

passwd oracle

Add kernel parameters to /etc/sysctl.conf

kernel.shmmni = 4096

kernel.shmmax = 4398046511104

kernel.shmall = 1073741824

kernel.sem = 250 32000 100 128

fs.aio-max-nr = 1048576

fs.file-max = 6815744

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

Apply kernel parameters

/sbin/sysctl -p

Add following lines to set shell limits for user oracle in file /etc/security/limits.conf

oracle   soft   nproc    131072

oracle   hard   nproc    131072

oracle   soft   nofile   131072

oracle   hard   nofile   131072

oracle   soft   core     unlimited

oracle   hard   core     unlimited

oracle   soft   memlock  50000000

oracle   hard   memlock  50000000

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

<IP-address>  <fully-qualified-machine-name>  <machine-name>

For example.

127.0.0.1 centos7 centos7.dbaora.com localhost localhost.localdomain

Verify your network settings

[root@centos7 ~]# ping -c 1 centos7

PING centos7 (127.0.0.1) 56(84) bytes of data.

64 bytes from centos7 (127.0.0.1): icmp_seq=1 ttl=64 time=0.040 ms

--- centos7 ping statistics ---

1 packets transmitted, 1 received, 0% packet loss, time 0ms

rtt min/avg/max/mdev = 0.040/0.040/0.040/0.000 ms

Modify .bash_profile for user oracle in his home directory

# Oracle Settings

export TMP=/tmp

export ORACLE_HOSTNAME=centos7.dbaora.com

export ORACLE_UNQNAME=ORA11G

export ORACLE_BASE=/ora01/app/oracle

export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1

export ORACLE_SID=ORA11G

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

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

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

alias cdob='cd $ORACLE_BASE'

alias cdoh='cd $ORACLE_HOME'

alias tns='cd $ORACLE_HOME/network/admin'

alias envo='env | grep ORACLE'

umask 022

Check which packages are installed and which are missing

rpm -q --qf '%{NAME}-%{VERSION}-%{RELEASE}(%{ARCH})\n' binutils \

elfutils-libelf \

elfutils-libelf-devel \

gcc \

gcc-c++ \

glibc \

glibc-common \

glibc-devel \

glibc-headers \

ksh \

libaio \

libaio-devel \

libgcc \

libstdc++ \

libstdc++-devel \

make \

sysstat \

unixODBC \

unixODBC-devel

In my case it returns following

binutils-2.23.52.0.1-16.el7(x86_64)

elfutils-libelf-0.158-3.el7(x86_64)

package elfutils-libelf-devel is not installed

gcc-4.8.2-16.el7(x86_64)

gcc-c++-4.8.2-16.el7(x86_64)

glibc-2.17-55.el7(x86_64)

glibc-common-2.17-55.el7(x86_64)

glibc-devel-2.17-55.el7(x86_64)

glibc-headers-2.17-55.el7(x86_64)

package ksh is not installed

libaio-0.3.109-12.el7(x86_64)

package libaio-devel is not installed

libgcc-4.8.2-16.el7(x86_64)

libstdc++-4.8.2-16.el7(x86_64)

libstdc++-devel-4.8.2-16.el7(x86_64)

make-3.82-21.el7(x86_64)

sysstat-10.1.5-4.el7(x86_64)

package unixODBC is not installed

package unixODBC-devel is not installed

Missing packages are on Centos 7 installation dvd. Other option if you are connected to internet is just use yum install command.

First option – just mount dvd and install missing packages using rpm -Uvh command from directory <mount dvd>/Packages.

In my case the directory is

/run/media/tomasz/CentOS 7 x86_64/Packages

NOTE – I’m using x86_64 version of packages

rpm -Uvh elfutils-libelf-devel*.x86_64.rpm

rpm -Uvh libaio-devel*.x86_64.rpm

rpm -Uvh unixODBC*.x86_64.rpm

rpm -Uvh ksh*.x86_64.rpm

Second option – use yum install command

yum -y install elfutils-libelf-devel

yum -y install libaio-devel

yum -y install unixODBC

yum -y install unixODBC-devel

yum -y install ksh

Create directory structure

mkdir -p /ora01/app

chown oracle:oinstall /ora01/app

chmod 775 /ora01/app

create ORACLE_BASE directory for oracle

mkdir -p /ora01/app/oracle

chown oracle:oinstall /ora01/app/oracle

chmod 775 /ora01/app/oracle

Create ORACLE_HOME directory for oracle

mkdir -p /ora01/app/oracle/product/11.2.0/db_1

chown oracle:oinstall -R /ora01/app/oracle

Disable secure linux by editing the “/etc/selinux/config” file, making sure the SELINUX flag is set as follows. It requires REBOOT to be effective !!!

SELINUX=permissive

In Centos Linux 7 /tmp data is stored on tmpfs which consumes memory and is too small. To revert it back to storage just run following command and REBOOT machine to be effective.

systemctl mask tmp.mount

Install database software

Let’s start with database software installation as oracle user.

su - oracle

--unzip software 11.2.0.4

unzip p13390677_112040_Linux-x86-64_1of7.zip

unzip p13390677_112040_Linux-x86-64_2of7.zip

--I defined 4 aliases in .bash_profile of user oracle to make

--administration heaven :)

[oracle@centos7 ~]$ alias envo cdob cdoh tns

alias envo='env | grep ORACLE'

alias cdob='cd $ORACLE_BASE'

alias cdoh='cd $ORACLE_HOME'

alias tns='cd $ORACLE_HOME/network/admin'

--run alias command envo to display environment settings

envo

ORACLE_UNQNAME=ORA11G

ORACLE_SID=ORA11G

ORACLE_BASE=/ora01/app/oracle

ORACLE_HOSTNAME=centos7.dbaora.com

ORACLE_HOME=/ora01/app/oracle/product/11.2.0/db_1

--run alias command cdob and cdoh to check ORACLE_BASE, ORACLE_HOME

[oracle@centos7 ~]$ cdob

[oracle@centos7 oracle]$ pwd

/ora01/app/oracle

[oracle@centos7 db_1]$ cdoh

[oracle@centos7 db_1]$ pwd

/ora01/app/oracle/product/11.2.0/db_1

--run installation from install directory

./runInstall