How to put the windows close button on the right?
Solution 1:
Just paste the following in your terminal,
gconftool-2 --set "/apps/metacity/general/button_layout" --type string ":minimize,maximize,close"
Now you can see that your buttons are placed in the right side.
To revert:
gconftool-2 --set "/apps/metacity/general/button_layout" --type string "minimize,maximize,close:"
Solution 2:
If you are less comfortable with then command line, then this is also a feature present in Ubuntu Tweak. This application helps you "tweak" many things on your Ubuntu installation, and I find it very useful (and very well maintained!).
Solution 3:
Or you just install gconf-editor on your Ubuntu, then open it and look for apps >> metacity >> general >> button_layout
change the value to:
:minimize,maximize,close
Which means "fill with blank space, minimize, maximize, close", making the buttons to be shown at right.