Before starting installation, create Oracle software owner user accounts, and configure their environments.

Oracle software owner user accounts require resource settings and other environment configuration. To protect against accidents, Oracle recommends that you create one software installation owner account for each Oracle software program you install.

• Creating an Oracle Software Owner User
  If the Oracle software owner user (oracle or grid) does not exist, or if you require a new Oracle software owner user, then create it as described in this section.
• Environment Requirements for Oracle Software Owners
  You must make the following changes to configure Oracle software owner environments:
• Procedure for Configuring Oracle Software Owner Environments
  Configure each Oracle installation owner user account environment:
• Modifying Oracle Owner User Groups
  If you have created an Oracle software installation owner account, but it is not a member of the groups you want to designate as the OSDBA, OSOPER, OSDBA for ASM, ASMADMIN, or other system privileges group, then modify the group settings for that user before installation.
• Setting Remote Display and X11 Forwarding Configuration
  If you are on a remote terminal, and the local system has only one visual (which is typical), then use the following syntax to set your user account DISPLAY environment variable:
• Preventing Installation Errors Caused by Terminal Output Commands
  During an Oracle Grid Infrastructure installation, OUI uses SSH to run commands and copy files to the other nodes. During the installation, hidden files on the system (for example, .bashrc or .cshrc) can cause makefile and other installation errors if they contain terminal output commands.