I want to disable the username in the GDM Login screen .
Step 1 . Logout of your current session and return to the GDM
Step 2. Switch to the tty command line prompt using Ctrl-Alt-F1
Step 3. Login using your normal login/password
Step 4. at the command line prompt type: export DISPLAY=:0.0
Step 5. then type: sudo -u gdm gconf-editor
Step 6. Switch back to the gdm screen using ALT-F7
Step 7. The Configuration Editor should be loaded.
Step 8. Go to apps/gdm/simple-greeter.
9. Change the Value of
disable_user_list to TRUE.
10. Close the Configuration Editor.
Final Step Reboot your machine
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