Where are gdm themes located?
Table of Contents
/usr/share/themes
In Ubuntu 18.04, I noticed that directory /usr/share/themes is where customized GTK themes, that beautify the Desktop and Lockscreen, are installed.
How do I use gdm themes?
More information is available in WARNING section of set-gdm-theme(1) man page. To read it, install gdm-tools and then run the command man 1 set-gdm-theme on the terminal. When man page shows up, type /warning and press enter. This will take you straight to the warning section of man page.
How do I customize gdm?

To configure GDM, use the GDM Configurator application. To open GDM Configurator, choose Applications->System Tools->GDM Configurator….You can configure GDM in the following functional areas:
- General.
- Standard greeter.
- Graphical greeter.
- Security.
- XDMCP.
How do I change my background on gdm?
Usage. Run the script with root privileges such as sudo ./change-gdm-background /path/to/image . If you see a message login image sucessfully changed , then, when you restart gdm or reboot your computer, your gdm background should be covered with the image you selected.

What is the difference between gdm3 and lightdm?
As the name suggests lightdm is more lightweight than gdm3 and it’s also faster. It is recommended to use lightdm. lightdm is ranked 2nd and gdm3 is ranked 6th in the best Linux Display Manager category.
Which display manager does Gnome use?
GDM
The GNOME Display Manager (GDM) is a program that manages graphical display servers and handles graphical user logins.
How do I change gdm background Arch?
Usage. Run the script with root privileges such as sudo ./arch-change-gdm-background /path/to/image . If you see a message login image sucessfully changed , then, when you restart gdm or reboot your computer, your gdm background should be covered with the image you selected.
What is GDM Arch?
From GDM – GNOME Display Manager: “The GNOME Display Manager (GDM) is a program that manages graphical display servers and handles graphical user logins.” Display managers provide X Window System and Wayland users with a graphical login prompt.
Which display manager is best?
Perhaps the most popular and certainly the most versatile display manager is LightDM. Having supplanted older display managers in popular distros, it is customizable and feature-packed. LightDM is also lightweight, and supports X.Org and Mir.
Which display manager GDM or LightDM?
GDM is the default DM in Ubuntu as of 17.10. LightDM is still the default for some other flavours, like Xubuntu or Lubuntu, and I doubt either of these projects will move to GDM, so LightDM should continue to be supported in Ubuntu.