how to check linux X11 version?

linux version x11
nimbus_debug picture nimbus_debug · Jul 12, 2013 · Viewed 20k times · Source

I need to read X11 source code, since there are a number of X11 versions, like: X11R1 X11R2 ... X11R7.7

how can I find out which version of X11 my ubuntu 10.04 has installed?

thank you.

Answer

Basile Starynkevitch picture Basile Starynkevitch · Jul 12, 2013

Filter the output of the xdpyinfo command 

xdpyinfo | grep version

will output something like

version number:    11.0
X.Org version: 1.20.4

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