xvfb - 2:21.1.7-3+deb12u8 main

Xvfb provides an X server that can run on machines with no display hardware
and no physical input devices. It emulates a dumb framebuffer using virtual
memory. The primary use of this server was intended to be server testing,
but other novel uses for it have been found, including testing clients
against unusual depths and screen configurations, doing batch processing with
Xvfb as a background rendering engine, load testing, as an aid to porting the
X server to a new platform, and providing an unobtrusive way to run
applications that don't really need an X server but insist on having one
anyway.
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This package also contains a convenience script called xvfb-run which
simplifies the automated execution of X clients in a virtual server
environment. This convenience script requires the use of the xauth
program.
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More information about X.Org can be found at:

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This package is built from the X.org xserver module.