Display manager

A Display manager presents the user with a login screen. A session starts when a user successfully enters a valid combination of username and password. It is typically a graphical user interface that is displayed at the end of the boot process in place of the default shell.

List of Display Managers

Graphical

• GDM (gdm): GNOME display manager
• LightDM (lightdm): Cross-desktop display manager
• SDDM (sddm): Simple Desktop Display Manager. Recommended for KDE (Plasma) and LXQt.
• XDM (xdm): X Display Manager
• LXDM (lxdm): A lightweight desktop login manager
• SLiM (slim): Desktop-independent graphical login manager for X11 (abandoned since 2013)

Console

• Agetty (agetty): Console based login manager

Daemon

• Greetd (greetd): Desktop independent lightweight login manager daemon