configure-gdm

# apt install gdm3 crudini # and use crudini for Microsoft INI file
# users can set their profile picture with cp avatar.png ~/.face
crudini --ini-options=nospace --set /etc/gdm3/greeter.dconf-defaults org/gnome/login-screen disable-user-list true
crudini --ini-options=nospace --set /etc/gdm3/greeter.dconf-defaults org/gnome/login-screen disable-restart-buttons true
crudini --ini-options=nospace --set /etc/gdm3/greeter.dconf-defaults org/gnome/settings-daemon/plugins/power sleep-inactive-ac-timeout 0
crudini --ini-options=nospace --set /etc/gdm3/greeter.dconf-defaults org/gnome/settings-daemon/plugins/power sleep-inactive-ac-type \'nothing\'
crudini --ini-options=nospace --set /etc/gdm3/greeter.dconf-defaults org/gnome/settings-daemon/plugins/power sleep-inactive-battery-type \'nothing\'
# set your own logo with cp yourlogo.png /usr/share/images/vendor-logos/logo-text-version-64.png
# or try apt install gdm-settings