1. Introduction
Gnome Show Manager (GNOME display MANAGER,GDM) provides an optional display manager for the X window System. The X Window System uses XDM as the display manager by default, but XDm needs to modify the settings by editing the configuration file. GDM allows configuration through a graphical interface. In addition, GDM can be a convenient custom theme.
2. Composition
GDM can run and manage the local and remote login x servers (via XDMCP). GDM is just a script that actually runs the GDM binary executable through him.
Gdm-stop is a script used to quickly terminate the currently running GDM Daemon.
The Gdm-restart script will quickly reboot the current daemon. However, Gdm-safe-restart will be restarted when everyone is logged out.
Gdmsetup is a graphical interface tool that can easily modify most common options.
Section excerpt from Baidu Encyclopedia and Wikipedia