Resolution:
The instructions for Linux environment are given below:

Node Agents
----------------
For node agents, do these steps:
1. Locate the .jar file that implements the CA agent API, smjavaagentapi.jar. Copy the file to each machine that hosts an ActiveMatrix node where you plan to enforce policy through a node agent. Place the file in this directory:
TIBCO_HOME/components/eclipse/plugins/com.tibco.policy.agent.lib.ext_2.5.0.005

2. Then edit the node’s TRA file, which is named envName_nodeName.tra. Modify the value of the variable tibco.env.LD_LIBRARY_PATH, by appending the full pathname of the location of the following SiteMinder files:
- libsmjavaagentapi.so
- libsmerrlog.so
- libsmcommonutil.so

3. Restart the node.
    
Proxy Agents
-----------------
For proxy agents, do these steps:
1. Locate the .jar file that implements the CA agent API, smjavaagentapi.jar. Copy this file to each machine that hosts an ActiveMatrix proxy agent, and place it in the directory TIBCO_HOME/tibcojre/1.5.0/lib/ext/.

2. Modify the LD_LIBRARY_PATH environment variable to include the location of the following SiteMinder files:
- libsmjavaagentapi.so
- libsmerrlog.so
- libsmcommonutil.so

3. Restart the proxy agent.

In the Policy Manager Installation Guide, instructions for configuring node agent/proxy agent to use CA SiteMinder for Authentication are specific to Microsoft Windows. Can I have instructions for Linux environment?