Before beginning an Oracle installation session, make sure that:
The Installation and User’s Guide (IUG) has been read and is available.
Any included Release Notes have been carefully reviewed. Don’t forget the README file usually found on the installation media—this file often contains critical information.
Appropriate installation media are available.
Required operating system changes have been made (e.g., kernel parameters and patches).
Sufficient disk space is available.
Sufficient system memory is available.
Desired Oracle components are identified.
Root, system manager, or other appropriate passwords are available.
The directory structure for Oracle files has been carefully planned.