Is there a way to allow typing in an arbitrary username from the login screen?
My use case is that I want to be able to hide users from the login screen, but still be able to login as those users. I was able to figure out hiding the users using the config files under /var/lib/AccountsService/users but now there's no way to log in as them.
Under lightdm this option seems to have been available. Can it still be done?
[SeatDefaults]section containinggreeter-show-manual-login=truein the appropriate conf file (I'd suggest something like/etc/lightdm/lightdm.conf.d/50-manual-login.conf) – steeldriver Jul 03 '17 at 18:42