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.
The following example shows how to create the user
oracle with the user ID 54321; with the primary group oinstall; and with secondary groups dba, asmdba, backupdba, dgdba, kmdba, and racdba:
# /usr/sbin/useradd -u 54321 -g oinstall -G dba,asmdba,backupdba,dgdba,kmdba,racdba oracle
The following example shows how to create the user grid with the user ID 54331; with the primary group oinstall; and with secondary groups dba, asmdba, backupdba, dgdba, kmdba, and racdba:
# /usr/sbin/useradd -u 54331 -g oinstall -G dba,asmdba,backupdba,dgdba,kmdba,racdba grid
You must note the user ID number for installation users, because you need it during preinstallation.
For Oracle Grid Infrastructure installations, user IDs and group IDs must be identical on all candidate nodes.