Login Managers
In most operating systems, you can log in and not think about the program that is showing you the login screen. You can do that in Linux, too. You can log in each time with the default login manager that came with your distribution. That is probably what most Linux users do. If you do want to learn more, however, here's your chance.
The login manager is the GUI program that shows you the text boxes to input your username and password. Depending on the login manager and the settings, you might see an icon to correspond to your username or even a whole snazzy theme. There isn't much that you need to know about your login manager, unless you want to change the settings for it. KDE and GNOME each have their own login manager programs. ...
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