I'd like to hide the user list on my Ubuntu Trusty login page.
This page tells me that I should set up a configuration in /etc/lightdm/lightdm.conf.d, and call it whatever I want. This does not work, and the page has a disconcerting message saying that Ubuntu is no longer testing LightDM. (But according to /etc/X11/default-display-manager, I'm using /usr/sbin/lightdm.)
This page tells me to create a configuration in /etc/lightdm/lightdm.conf, which also does not work.