Start all the RAC nodes, login to RAC1 as the oracle user and start the Oracle installer
./runInstallerUncheck the security updates checkbox and click the "Next" button
Accept the "Create and configure a database" option by clicking the "Next" button
Accept the "Server Class" option by clicking the "Next" button
Make sure both nodes are selected, then click the "Next" button
Accept the "Typical install" option by clicking the "Next" button
Enter "/u01/app/oracle/product/11.2.0/db_1" for the software location. The storage type should be set to "File System" with the file location set to "/u01/oradata". Enter the appropriate passwords and database name, in this case "RAC.localdomain"
Wait for the prerequisite check to complete. If there are any problems either fix them, or check the "Ignore All" checkbox and click the "Next" button
If you are happy with the summary information, click the "Finish" button
Wait while the installation takes place
Once the software installation is complete the Database Configuration Assistant (DBCA) will start automatically
Once the Database Configuration Assistant (DBCA) has finished, click the "OK" button