If you are using the Gnome desktop and have played with the wallpaper (Appearance) settings, you will discover that there is an inbuilt slideshow feature that you can use to change the wallpaper at regular interval. While this is a useful feature, it is rather limited since it can only rotate among the default wallpapers and not your custom collection of wallpapers. For those who wish to create your own slideshow and don’t want to have a third-party wallpaper changing app running in the background, here’s how you can do it in Ubuntu.
By editing the xml template in the “/usr/share/backgrounds/contest” directory, you can create a slideshow with your own wallpapers. However, this is a tedious and troublesome task, especially if you have hundreds or thousands of wallpapers in your collection. A faster way is to use crebs.
Installation
There is a PPA for crebs, but it is only available for Ubuntu Natty and below.
In Ubuntu Natty,
sudo add-apt-repository ppa:crebs/ppa sudo apt-get update sudo apt-get install crebs