Set Desktop and Lock Screen Wallpaper from Shell in KDE Plasma

You can easily set both desktop and lock screen wallpaper in KDE Plasma using a simple shell script. This is especially useful for automation tools, scripting, or apps like qimgv that allow external scripts.

Save the following to a file, for example set-wallpaper.sh:

#!/bin/bash

# Set desktop wallpaper
plasma-apply-wallpaperimage "$1"

# Set lock screen wallpaper
kwriteconfig5 --file kscreenlockerrc \
  --group Greeter \
  --group Wallpaper \
  --group org.kde.image \
  --group General \
  --key Image "file://$1"

Make the Script Executable:

chmod +x set-wallpaper.sh

Run the Script:

./set-wallpaper.sh /path/to/your/image.jpg