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.
• About Using Oracle Solaris Projects
  For Oracle Grid Infrastructure 18c, if you want to use Oracle Solaris Projects to manage system resources, you can specify different default projects for different Oracle installation owners.
• 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.