gdm

Start GDM

$ systemctl start gdm

$ systemctl stop gdm

$ systemctl enable gdm

$ systemctl restart gdm

$ systemctl status gdm

gdm [options]

gdm (GNOME Display Manager) is the graphical login manager for GNOME. It provides the login screen, user authentication, and session management for desktop environments.
GDM handles user selection, password authentication, and starting desktop sessions. It supports multiple sessions, accessibility features, and user switching.
gdm is typically started by systemd and runs as a system service.

--version

Display version.

Display help information.

/etc/gdm/custom.conf

Main GDM configuration file controlling login behavior, auto-login, and session settings.

Alternative configuration path on Debian-based systems.

Requires X11 or Wayland. Configuration through dconf. Managed by systemd on modern systems.

GDM was created as part of the GNOME project to provide a display manager integrated with the GNOME desktop environment. It replaced xdm for GNOME users.

lightdm(1), sddm(1), xinit(1)