The Post-Install Checks failed with errors shown for

Http, Login page, Virtual directory, JSP, and Help Page

HTTP
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checking URL = http://linux.server:8000

RW-50015: Error: - HTTP Listener is not responding. The service might not have started on the port yet. Please check the service and use the retry button.

Virtual Directory
------------------

RW-50015: Error: - Http Server Virtual Directories is not responding. The service might not have started on the port yet. Please check the service and use the retry button.


Login Page
-----------

RW-50015: Error: - Login Page is not responding. The service might not have started on the port yet. Please check the service and use the retry button.

JSP
----

checking URL = http://linux.server:8000/OA_HTML/jtfTestCookie.jsp

RW-50015: Error: - JSP is not responding. The service might not have started on the port yet. Please check the service and use the retry button.

Help Page
----------

checking URL = http://linux.server:8000/OA_HTML/help

RW-50015: Error: - Help Page is not responding. The service might not have started on the port yet. Please check the service and use the retry button.


Are we missing some Linux files required for Apache server installation