Windows question !!
 

Hello
it is possible to use windows remote desktop into ubuntu 9.04
If so, how to do it ?

There are various app for doing that, as grdesktop.

Cheers.

For accessing a remote Ubuntu machine from Windows, I typically use FreeNX. I have read that there is a newer program out that is even better, but I can't recall what its name is. One important thing to consider is that whatever approach you take, you want it to be secure (encrypted).

Or else you can run x11vnc and use a VNC Client (RealVNC, TightVNC, etc) from a remote PC or smartphone to login into your Ubuntu machine.

EDIT: Oops, I read it wrong. Yes, you could just as well use grdesktop to login to a Windows machine.

There seems to be some confusion about which direction you mean. I think "into" used that way would mean keyboard, Video and mouse physically on a Windows workstation used with programs running on a Linux system. But you might mean the opposite.

There are three protocols I have used in such situations:

Remote desktop: There are a few Linux programs that can be used for the KVM on Linux to use programs on Windows (with nothing extra installed on the Windows side) via remote desktop.
I'm not sure what might be available for remote desktop protocol in the other direction.

VNC: There are many choices available for VNC "client" (KVM side) and "server" (program side) for each of Linux and Windows. So you can set up VNC for either or both directions in many different ways.

Direct use of X: "Client/Server" terminology is backwards for X. The "client" is the program side and the "server" is the KVM side. There are a few choices for Widows X server and a few choices for Linux X client. That is for Windows KVM with Linux programs. I'm not sure about the reverse. Some or all of the VNC setups include X client/server inside the VNC setup. I would still call those setups VNC rather than X.

If it worked for me, my choice for Windows KVM with Linux programs would be a Windows X "server" setup without a Linux desktop. Each Linux program would run in its own window on the Windows desktop. That does work on many Windows systems. My Windows system has four CRTs on two display cards. That display configuration triggers bugs in every Windows X server, such that the individual window per program mode doesn't work.

I sometimes use X directly with a Windows X server holding a full Linux desktop in a single Windows window. More often, I use VNC, so a whole Linux display is in a Windows window while one program on the Linux system acts as X server for the Linux programs I am running while acting as VNC server for the Windows VNC client.

I also frequently use VNC instead of remote desktop for a Windows to Windows connection. VNC is more flexible and controllable than remote desktop and generally does a better job at the same basic task.