So you’re running Oracle on REHL, and you’re tired of looking at the same old, boring login screen. Or you may be running multiple VMs and want to make a visual difference between them. Here is a way to edit the GDM (Gnome Display Manager) to add a few more themes that will provide you with a different login screen, and possibly, a cool looking Oracle VM.
To get some new GDM themes go to http://art.gnome.org, select Themes>GDM Greeter, and choose download the ones you like. Once downloaded, unzip them to /usr/share/gdm/themes.
RHEL 5 comes with a number of commands that allow you to manage the available GDM themes. To test a theme and see what it looks like, you can use:
$ gdmthemetester console <themename>
Once you’ve decided on a theme, use the following command to select it:
$ gdmsetup <themename>
Finally, apply the theme:
To change the login background on RHEL 6 do the following:
sudo cp /usr/share/applications/gnome-appearance-properties.desktop /usr/share/gdm/autostart/LoginWindow
Log out, then a pop-up window that allows you to select a background picture will come up. Choose a back ground, log in and execute:
sudo unlink /usr/share/gdm/autostart/LoginWindow/gnome-appearance-properties.desktop
to keep the pop-up window from coming up every time you log in.