Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
In Linux, setting an image as the desktop wallpaper is not a difficult task, but getting it to change automatically at a certain interval is. While there are plenty of wallpaper-changing apps available for Windows, there are only a limited few for Linux.
If you have a good collection of wallpapers and want to see them in action on your desktop, here are 5 wallpaper changers that you can use in your Linux machine. Most, if not all, of them are meant for the GNOME and KDE desktop.
Webilder is one of the best wallpaper changers for Linux. Not only does it change your wallpaper at regular intervals but it can also download images directly from Flickr and WebShots (requires a paid account) and add them to your collection.
When downloading from Flickr, you can configure it to download photos that match the tags you specified, or just to download the most interesting photo of the day.
If you run out of tags idea, you can also check out the Webilder channel to see what others are downloading and add their tags to your Webilder.