I was looking for a way to create screenshots of my pinephone. After reading this nice article it was clear that grim can do the job.

grim(1)                                  General Commands Manual                                  grim(1)

NAME
       grim - grab images from a Wayland compositor

DESCRIPTION
       grim [options...] [output-file]

SYNOPSIS
       grim is a command-line utility to take screenshots of Wayland desktops. For now it requires sup‐
       port for the screencopy protocol to work. Support for the xdg-output protocol is optional, but im‐
       proves fractional scaling support.

       grim will write an image to output-file, or to a timestamped file name in $GRIM_DEFAULT_DIR if not
       specified. If $GRIM_DEFAULT_DIR is not set, it defaults to $XDG_PICTURES_DIR. If output-file is -,
       grim will output the image to the standard output instead.

OPTIONS
       -h
           Show help message and quit.

       -s <factor>
           Set the output image's scale factor to factor. By default, the scale factor is set to the
           highest of all outputs.

       -g "<x>,<y> <width>x<height>"
           Set the region to capture, in layout coordinates.

           If set to -, read the region from the standard input instead.

       -t <type>
           Set the output image's file format to type. By default, the filetype is set to png, valid val‐
           ues are png, jpeg or ppm.

       -q <quality>
           Set the output jpeg's filetype compression rate to quality. By default, the jpeg quality is
           80, valid values are between 0-100.

       -o <output>
           Set the output name to capture.

       -c
           Include cursors in the screenshot.

AUTHORS
       Maintained by Simon Ser <contact@emersion.fr>, who is assisted by other open-source contributors.
       For more information about grim development, see https://github.com/emersion/grim.

                                                2020-01-21                                        grim(1)

Because my pinephone is running Debian I’ve installed grim with apt.

sudo apt install grim

I’ve also installed openssh-server on my pinephone, so I can log in on my pinephone over ssh.

To take a screenshot, I log in (ssh) from my desktop to my pinephone. On my desktop I type

grim

which creates a screenshot of the pinephone with a filename like 20200502_22h23m07s_grim.png:

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