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I read a very short description of how to make a Screenshot by making use of the file which represents the framebuffer /dev/fb0.

in order to write the screen content:

cat /dev/fb0 > file

in order to restore the screenshot:

cat file > /dev/fb0

I did so, but nothing happened, not even a short blink, so I find a possible hint to an answer:

Writes to FrameBuffer /dev/fb0 do not seem to change graphics screen

But, there was only an answer I did not understand which required knowledge in C programming language (at least the Code looked to me like C )

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  • +1 making a screenshot from the terminal without using obscure utilities is certainly worth consideration.
    – Vorac
    Jul 21, 2020 at 6:16

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