By default, DB2 uses rsh when executing commands on remote DB2 nodes, for example, when starting a remote DB2 database partition. To use the DB2 default, the rsh-server package must be installed (see table below). For a comparison between rsh and ssh, see the “Security issues when installing DB2” section of the Administration Guide: Implementation.

If you choose to use the rsh remote shell utility, inetd (or xinetd) must be installed and running as well. If you choose to use the ssh remote shell utility, you need to set the DB2RSHCMD registry variable immediately after the DB2 installation is complete. If this registry variable is not set, rsh is used. For more information on the DB2RSHCMD registry variable, see the Performance Guide book.

vThe nfs-utils Network File System support package is required for partitioned database systems.

All required packages should be installed and configured before continuing with the DB2 setup. For general Linux information, see your Linux distribution documentation.

Package requirements for SUSE Linux

Package name

Description

 

 

 

 

 

pdksh

Korn Shell. This package is required for partitioned database

 

environments.

 

 

 

 

 

openssh

This package contains a set of server programs which allow

 

users to run commands on (and from) remote computers via a

 

secure shell. This package is not required if you use the default

 

configuration of DB2 with rsh.

 

 

 

 

rsh-server

This package contains a set of server programs which allow

 

users to run commands on remote computers, login in to other

 

computers, and copy files between computers (rsh, rexec, rlogin,

 

and rcp). This package is not required if you configure DB2 to

 

use ssh.

 

 

 

 

 

nfs-utils

Network File System support package. It allows access to local

 

files from remote computers.

 

 

 

 

Package requirements for Red Hat

 

 

 

 

 

Directory

 

Package name

Description

 

 

 

/System Environment/Shell

pdksh

Korn Shell. This package is required for

 

 

 

partitioned database environments.

 

 

 

 

/Applications/Internet

 

openssh

This package contains a set of client

 

 

 

programs which allow users to run

 

 

 

commands on a remote computer via a

 

 

 

secure shell. This package is not

 

 

 

required if you use the default

 

 

 

configuration of DB2 with rsh.

 

 

 

 

/System Environment/

 

openssh-server

This package contains a set of server

Daemons

 

 

programs which allow users to run

 

 

 

commands from a remote computer via

 

 

 

a secure shell. This package is not

 

 

 

required if you use the default

 

 

 

configuration of DB2 with rsh.

 

 

 

 

12Getting started with DB2 installation and administration

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IBM VERSION 9 manual Package name Description

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