These steps describe how to use Oracle Universal Installer to install Oracle Real Application Clusters.

1. Ensure that you can access other nodes with SSH. OUI requires that the user account running the Oracle RAC installation is permitted to set up passwordless SSH. OUI can set this up for you automatically, or your system administrator can set this up for you before installation is started.
2. Open the terminal from which you intend to run OUI, and log in as the user account that you want to own the Oracle Database installation (for example, oracle).

   If you are not able to turn off stty commands, or have other restrictions that prevent automatic SSH configuration from within OUI, then you must ensure that SSH is configured and enabled before you proceed to start OUI.

3. Ensure that you have su or sudo credentials, because you will be prompted to run a script as the root user during installation.
4. Start the runInstaller command from the Oracle Database 12c Release 2 (12.2) installation media or install binary download area. For example, if the software binary download area is /home/oracle/oraclesw , enter the following commands:

   $ cd /home/oracle/oraclesw
   $ ./runInstaller
   

5. Provide information or run scripts as root when prompted by OUI. If you need assistance during installation, click Help. Click Details to examine the log file.

   Note:

   You can run the root.sh script simultaneously on all nodes in the cluster for Oracle RAC installations or upgrades.

   If you encounter problems during installation, then examine the OUI actions recorded in the installation log file. The log file is located in the Oracle Inventory directory with a name that includes the time stamp (date_time) of the installation process, as shown in this example:

   OraInventory/logs/installActionsdate_time.log

   Caution:

   Do not install Oracle Database with Oracle RAC software into the same home in which you install Oracle Grid Infrastructure software.

   Because Oracle ASM is part of the Oracle Grid Infrastructure home, it cannot be upgraded during an Oracle RAC installation.