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Asked: 2026-05-25T06:03:33+00:00

I need some clarifications about the X Server and the applications. As described in

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I need some clarifications about the X Server and the applications. As described in the wiki: X Window System protocols and architecture, “X server is go-between for the user and the client programs, …,”

My question is, after a Linux PC starts, e.g., CentOS, at beginning, X Server starts to run (taking keyboard, mouse, monitors),

  1. does X Server serve I/O for all the subsequent application programs? If not, how to make program A via X Server, while program B not via X Server?

  2. what about other GUI programs, e.g. If I have a Qt program, does it also go via x server, like keyboard/monitor <-> X Server <-> Qt? If not, how is this situation handled?

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1 Answer

  1. Editorial Team

    1. Yes. Even the console applications will run in a terminal-like application that will be a client of X.

    2. Yes. Qt programs do go through X.

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