Yes you are absolutely right, Java is independent of the platform but JVM is not and that’s why each OS has its own JVM.
You can install the WM Suite and tweak it around to point to the ubuntu JVM and probably make the it work but this would mean you will be running on an unsupported\not tested mix of products.
If the benefits outweigh the risks it is definitely worth trying and get a custom support package from a third party vendor (If there are no licensing issues with SAG).
Cheers,
Akshith
#webMethods-Archive#webMethods#Integration-Server-and-ESB