How to take a screenshot of a virtual display in linux?

Question

linux

Look, I start programs like this with the following command:

DISPLAY=:99 xvfb-run -a -n 1 -l -s "-screen 0, 1920x1080x8" python3 main.py

How can I take a screenshot of the display on which I launched it?

Answer 1

vncsnapshot
is in the upd repositories . I didn’t think that you might not have a vnc server, the X server itself can give screenshots, the utility

xwd -root -display :99 | convert - png:- > screenshot.png

in this case xwd (x11-app package) takes the screenshot and convert (imagemagic package) converts it to png