Downloads a random image from Unsplash and sets the wallpaper every so often (currently only works with Gnome/Unity/Cinnamon/etc)

unsplash_wallpaper.sh

#!/bin/sh

while :
do
	wget -q -O unsplash_wallpaper.jpg https://unsplash.it/1920/1080/?random
	gsettings set org.gnome.desktop.background picture-uri file://$PWD/unsplash_wallpaper.jpg
	sleep 1h   # Change this if you want a different update frequency (e.g. 30m, 12h, 24h, etc...).
done

Here's for OSX.

#!/bin/sh

while :
do
	wget -q -O unsplash_wallpaper.jpg https://unsplash.it/1920/1080/?random
        osascript -e 'tell application "Finder" to set desktop picture to POSIX file "$PWD/unsplash_wallpaper.jpg"'	
	sleep 1h
done

If you want curl instead just replace the wget line.

curl -o unsplash_wallpaper.jpg https://unsplash.it/1920/1080/?random

I found this page after searching earlier today. I decided to your your idea and came up with this:

#!/bin/bash

function unsplash {
    local FILENAME=unsplash-$(cat /proc/sys/kernel/random/uuid | sed 's/[-]//g' | head -c 10;echo)
    wget -q -O $FILENAME.jpg https://unsplash.it/1920/1080/?random
    echo $FILENAME.jpg
    convert -geometry 450x $FILENAME.jpg $FILENAME-450w.jpg
    convert -geometry 800x $FILENAME.jpg $FILENAME-800w.jpg
}
unsplash

Generates 3 random files.

• unsplash-RANDOMUUID.jpg
• unsplash-RANDOMUUID-450w.jpg
• unsplash-RANDOMUUID-800w.jpg

👍