minimizeall.sh

#!/bin/bash
# I had a problem with KDE Plasma minimizing windows with Meta+D, without the others being maximized when I tried to re-maximize one of the programs,
# finally, with a separate script and setting it to run on a custom shortcut for Meta+D, it worked :

# -----
# sudo apt install xdotool
# sudo pacman -S xdotool
# sudo dnf install xdotool

# first, install the 'xdotool' package according to your distribution and package manager, then use the code:
# -----

for win in $(xdotool search --onlyvisible --class .); do
    xdotool windowminimize $win
done