gdm

The GNOME Display Manager (GDM) is a replacement for the X Display Manager (XDM). tldr-pages

On several platforms

Several platforms

Run the GNOME Display Manager application

Prevent gdm from being run as a daemon background process

gdm --nodaemonIdentify

Disable gdm management of local console X servers for headless or remote environments

gdm --no-consoleIdentify

Prevent sanitizing environment variables that start with $LD_

gdm --preserve-ld-varsIdentify

Display help

gdm --helpIdentify

Display version

gdm --versionIdentify