I don't really have a problem, I was just wondering where I could find some documentation about what exactly X server, Xorg, LightDM and stuff like that does.. I always stumble upon those terms, I know they have something to do regarding the graphics, but I'd like to know more.
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X-Windows is a Unix/Linux Client-Server system. Although usually on the same computer, the Client and Server can be on different computers, unlike Microsoft Windows. X11 is a network protocol. It encodes things such as graphic primitives, images, pointer motion, and key presses. X clients are graphical applications like Firefox. Xorg is an X server. It implements X11 and provides an interface to keyboards, mice, and video cards. Gnome, KDE, LXDE, and Xfce are desktop environments. They provide libraries and specifications that applications use When running X-Windows, instead of a console login, the Display Manager i.e. Lightdm starts up. The DM starts the X-server and asks for login credentials and then launches the user's desktop environment. Hope that helps. |
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For background information on applications running on Ubuntu I always find the following resources useful: For deeper insights or other views on applications that run in different distributions we can also find a lot here:
This list is incomplete, I know. |
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This architectural overview is a bit outdated, but still mostly applies: |
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