tldr/pages/common/xephyr.md

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}}