A question I have seen around a bit is how to remove the user list from the GDM login screen, as for many supplying the names of users at login on shared computers is a security issue. After all, someone trying to log in just needs to figure out a password (while that’s the hard part, the security-minded look at that as already half way into the system).
For most of us, the user list is not needed anyway, as single users can opt to boot straight to the desktop, and users of shared computers don’t need a menu reminding them of what their names are. So, to remove the user menu from your login, enter the following in a terminal:
--set /apps/gdm/simple-greeter/disable_user_list True
No user names will be displayed, and everyone logging in will have to type their user names rather than pick them from a menu.
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