The infrastructure details can be found here.
Unlike Oracle SOA Suite 11g and Oracle Service Bus 11g which use Weblogic server 10.3.4, Weblogic Portal 10.3.2 requires Weblogic Server 10.3.2. To fulfill the version compatibility, the WLP has been installed into its own middleware home, wlpmw, sits at the same level as osbmw in the file hierarchy.
To install Weblogic Portal 10.3.2, the following installation binary is used (downloadable from Oracle website).
1) Login as oracle user
2) execute portal103_linux32.bin
3) Follow the steps depicted in the following images
Uncheck the 'Run Quickstart' checkbox, we will create the domain later.