Before installation, create operating system groups and users, and configure user environments.

• Creating Groups, Users and Paths for Oracle Grid Infrastructure
  Log in as root, and use the following instructions to locate or create the Oracle Inventory group, and create a software owner for Oracle Grid Infrastructure, and directories for Oracle home.
• Oracle Installations with Standard and Job Role Separation Groups and Users
  A job role separation configuration of Oracle Database and Oracle ASM is a configuration with groups and users to provide separate groups for operating system authentication.
• Creating Operating System Privileges Groups
  The following sections describe how to create operating system groups for Oracle Grid Infrastructure and Oracle Database:
• Creating Operating System Oracle Installation User Accounts
  Before starting installation, create Oracle software owner user accounts, and configure their environments.
• Configuring Grid Infrastructure Software Owner User Environments
  Understand the software owner user environments to configure before installing Oracle Grid Infrastructure.
• Enabling Intelligent Platform Management Interface (IPMI)
  Intelligent Platform Management Interface (IPMI) provides a set of common interfaces to computer hardware and firmware that system administrators can use to monitor system health and manage the system.