How to set newly opened window at the center of the screen in Xubuntu? Is it possible? In Ubuntu it can be easily done by Compiz Config Setting Manager.
There's no need to install anything or mess with scripts. Open the settings manager, click on Window Manager Tweaks, select the Placement tab, and slide the bar under "Minimum size of windows to trigger smart placement:" all the way to the right. Every window you open should now be centered.
You can install
Then look at this thread: HOWTO: Center / Re-position Windows .
There is an example for centering mplayer:
Hope this helps!
I use Lubuntu which has Openbox as the default window manager and Openbox can position windows quite easily.