JavaFX 2 is not support Linux yet. Does this mean a client Linux machine (user machine) cannot run it or a server Linux machine (host machine) cannot run it or both?
*EDIT:*
JavaFX is for rich client. So the server will not run it, but store it and client will get it and run it, right?
It means you can’t use the JavaFX libraries on a machine running Linux. Neither a client Linux machine, nor a server Linux machine can use them.
Response to Edit
You can still store and serve JavaFX code on Linux machines. You just can’t execute the JavaFX code on a Linux machine.
Note that JavaFX is different from Java. You can still use Java on Linux machines.