Change wallpaper in Linux Mint (cinnamon) according to daytime with MacOS Mojave wallpapers

change_wallpaper.sh

#!/bin/bash
wallpaper=`ruby get_wallpaper_url.rb`
# https://stackoverflow.com/questions/10374520/gsettings-with-cron#19666729
PID=$(pgrep -fo cinnamon-session)
export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-)
gsettings set org.cinnamon.desktop.background picture-uri "file://${wallpaper}"

get_wallpaper_url.rb

#!/usr/bin/env ruby

hour_offest = 5
hour = Time.new.hour - hour_offset
hour = 24 + hour if hour < 0
wallpaper_number = hour.to_f / 1.5
picture = "#{__dir__}/mojave_dynamic_#{wallpaper_number.ceil}.jpeg"
puts picture

howto.md

Change wallpaper in Linux Mint (cinnamon) according to daytime with MacOS Mojave wallpapers

• download the backgrounds (e.g. https://files.rb.gd/mojave_dynamic.zip, from https://www.reddit.com/r/MacOS/comments/8oz5h5/all_16_full_resolution_macos_mojave_dynamic/)
• put the scripts in the folder of the background images
• configure your cronjob, e.g.: 0 * * * * /home/user/path_to_your_wallpaperfolder/change_wallpaper.sh