How to Hiding Users In the GDM login manager - Linux Ubuntu 9:10 Karmic

For some reason, Ubuntu Karmic 9:10 does not have a list of user settings in GDM login, it is enough to make uncomfortable. How I must do if I want to hide a user from that list?. I found a simple trick like this : Alternative 1 In the terminal type this command: sudo gconftool-2 - direct - config-source xml: readwrite: / etc / gconf / gconf.xml.mandatory - type Boolean - set / apps / gdm / simple-greeter / disable_user_list True These alternatives work well, and all users are hidden in the list of GDM login. Alternative 2 Logout, go to the tty command line using the Ctrl-Alt-F1 login after login type this command: export DISPLAY =: 0.0 sudo gconf-editor gdm GDM screen into another using ALT-F7 go to / apps / gdm / simple-greeter and tick disable user list restart gdm using sudo / etc / init.d / gdm restart