Three user group accounts are required on each node in the cluster.
To create the group accounts on each node in the cluster for Linux systems
Create a group for the DB2 UDB instance owner. For example, enter:
# groupadd -g 999 db2iadm1
Create a group for the user to execute fenced user-defined functions (UDFs) or store procedures. For example, enter:
# groupadd -g 998 db2fadm1
Create a group for the database administration server. For example, enter:
# groupadd -g 997 db2asgrp