I don't want anyone to be able to shut down my computer from the login screen. Can I remove the shutdown button at the top right corner of the login screen in Ubuntu 12.04?
Even if you cannot hide the buttons, you can configure your system so that the
There aren't any configuration tools for LightDM that I know of, and if there are, there certainly wouldn't be any way to remove that button.
Unless you want to rewrite LightDM yourself.