Installation of Oracle 11g R1 (220.127.116.11) Real Application Cluster (RAC) Software on Linux (CentOS EL 4 Update 5 x86)
By Bhavin Hingu
This document explains the step by step process of
installing Oracle 11g R1 RAC for DB home using OUI.
runInstaller as oracle user from any one node after setting appropriate
oracle base (/u01/app/oracle).
[oracle@node1-pub ~]$ export ORACLE_BASE=/u01/app/oracle
[oracle@node1-pub ~]$ 11g_database/database/runInstaller
Select "Custom" and Click Next.
Select all the nodes and Click Next
At this step, you should not receive any error. If you have configured the Pre-Installation
steps correctly, then you will not get any errors. I get one warning here as you can see which
is complaining about the low memory than required. I had only 512 MB ram and the required memory
is 1GB but I would not worry about this warning and will check the status box.
Leave the Default values (dba, dba) and Click Next
Select "Install database Software Only" and Click Next
Execute the mentioned script on all the nodes.
At this time, create an env file on all the nodes with the appropriate value of ORACLE_HOME and PATH.
oracle@node1-pub ~]$ cat
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
# User specific environment and startup programs
# The below piece of code avoid the RAC installation error due to stty
if [ -t 0 ]; then
stty intr ^C
At this point, we are ready to create a RAC database next.