Can I take a screenshot of a virtual console?

Question

Is there a way for me to take a screenshot in a virtual console?

score 21 · Accepted Answer · edited Oct 21 '20 at 13:39

21

There's an application called fbgrab provided by the fbcat package that (as the name might suggest) grabs a shot of the current framebuffer. This might not work on newer KMS setups.

sudo apt-get install fbcat
fbgrab screenshot.png

If that fails, you could always use a VM in VirtualBox.

If you want to take a picture of another TTY, fbgrab takes a -c N argument (where N is replaced with the /dev/ttyN you're using).

So if you wanted tty1:

sudo fbgrab -c 1 Desktop/tty-screenshot.png

edited Oct 21 '20 at 13:39

answered Nov 08 '10 at 23:46

Oli

293,335

1

When I try fbgrab foo.png it says Error: Couldn't open /dev/fb0.. Any idea why? – trusktr Nov 19 '12 at 22:24
3

@trusktr I know this is late, but it may be because you aren't in the video group. Try editing the file /etc/group, and adding your username to the end of the line that starts with "video". If that doesn't work, try using the app as root – Braden Best Jan 01 '14 at 02:42
@B1KMusic Thanks, I'll have to try it when my new laptop arrives next week. I have Windows in the interim. – trusktr Jan 19 '14 at 05:29
1

I had to use sudo -E fbgrab vt1.png. But it worked great. – isomorphismes Jun 10 '15 at 04:19
The best answer so far and it worked! – Smeterlink Aug 17 '22 at 15:18

score 19 · Answer 2 · edited Apr 20 '17 at 17:56

19

To take a screenshot of the first virtual console (AKA screendump) and save it to a file called "screenshot":

sudo cat /dev/vcs1 > screenshot

Using this method, the screenshots are saved in plain text format, not an image (check this with file or mimetype command). It simply outputs a screen dump and then EOF. Note that the output does not contain newline characters, so some processing may be required:

sudo cat /dev/vcs1 | fold  > screenshot

fold wrap each input line to fit in specified width (80 by default).

You cannot take the screenshot of a virtual console when graphics is enabled.

Reference

VCS: vcs, vcsa - virtual console memory

edited Apr 20 '17 at 17:56

Pablo Bianchi

15,657

answered Nov 08 '10 at 23:59

Sid

10,533

1

what do you mean text format? The RGB values are saved in a text file, or the text contents of the terminal is saved? Usually people want a screenshot to capture some visual bug which doesn't transfer to encoded character output. – jiggunjer Feb 23 '17 at 02:31

Can I take a screenshot of a virtual console?

2 Answers2

Reference

Linked

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