Centralized user-management considerations Linux

Related concepts:

v“Security issues when installing the DB2 database manager” on page 6

Related tasks:

v“Modifying kernel parameters (Linux)” in Quick Beginnings for DB2 Servers

v“Preparing to install DB2 for Linux on zSeries” in Quick Beginnings for DB2 Servers

Related reference:

v“Communication protocols supported” in Quick Beginnings for DB2 Clients

v“IBM Software Development Kit for Java levels for DB2 products” in Quick Beginnings for DB2 Servers

v“Communications variables” in Performance Guide

Centralized user-management considerations (Linux)

In environments that include security software, such as NIS (Network Information Services) or NIS+, there are some installation considerations. The DB2 installation scripts attempt to update objects that are under the control of the security packages, such as users and groups, and will not be able to do so if NIS or NIS+ is being used for user management.

At instance creation, without a security component present, instance owner’s group list is modified to include that of the database administrative server (DAS) user’s primary group, if the DAS is created. If the instance creation program is unable to modify these properties (it will not if NIS/NIS+ is controlling the group), it reports that it could not. The warning message provides the necessary information to manually make the changes.

These considerations hold true for any environment in which an external security program does not allow the DB2 installation or instance creation programs to modify user characteristics.

If the DB2 Setup wizard detects NIS on your computer, you are not given the option of creating new users during the installation. Instead, you must choose existing users.

Consider the following restrictions if you are using NIS or NIS+:

vGroups and users must be created on the NIS server before running the DB2 Setup wizard.

vSecondary groups must be created for the DB2 instance owner and the DB2 Administration Server on the NIS server. You must then add the primary group of the instance owner to the secondary DB2 Administration Server group. Likewise, you must add the primary DB2 Administration Server group to the secondary group for the instance owner.

vOn a partitioned DB2 database system, before you create an instance, there must be an entry for the instance in the etc/services file. For example, if you want to create an instance for the user db2inst1, you require an entry similar to the following:

DB2_db2inst1 50000/tcp

Related tasks:

v“Installing DB2 servers (Linux)” on page 19

14Getting started with DB2 installation and administration

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