I script that would run hourly to change the background wallpaper on Linux for images coming from Unsplash. They disabled source.unsplash.com so it doesn't work anymore.

unsplash.sh

#!/bin/bash

# They stopped "source.unsplash.com" service
# So that script doesn't work anymore unfortunately ...

# If started as root, then re-start as user "gavenkoa":
if [ "$(id -u)" -eq 0 ]; then
    exec sudo -H -u YOUR_USERNAME $0 "$@"
fi

REAL_UID=$(id --real --user)
PID=$(pgrep --euid $REAL_UID gnome-session | head -n 1)
export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2- | sed -e "s/\x0//g")

wget -q -O /tmp/wallpaper.jpg https://source.unsplash.com/1920x1080/?landscape,mountain,forest,stars,space,galaxy;
gsettings set org.gnome.desktop.background picture-uri-dark file:///tmp/wallpaper.jpg;
gsettings set org.gnome.desktop.background picture-uri file:///tmp/wallpaper.jpg;

exit 0;