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Xephyr — A nested X server that runs as an X application. More information: <https://manned.org/xserver-xephy

Submitted by: @import:tldr-pages·Mar 2, 2026·

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servernestedcommandrunsclixephyrthatapplication

Problem

How to use the Xephyr command: A nested X server that runs as an X application. More information: <https://manned.org/xserver-xephyr>.

Solution

Xephyr — A nested X server that runs as an X application. More information: <https://manned.org/xserver-xephyr>.

Create a black window with display ID ":2":

Xephyr -br -ac -noreset -screen {{800x600}} {{:2}}

Start an X application on the new screen:

DISPLAY=:2 {{command_name}}

Code Snippets

Create a black window with display ID ":2"

Xephyr -br -ac -noreset -screen {{800x600}} {{:2}}

Start an X application on the new screen

DISPLAY=:2 {{command_name}}

Context

tldr-pages: common/Xephyr

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