I haven't found the licensing data for the Forever by Shady S wallpaper, which would be very helpful as I am interested in uploading it to a Wiki, hence a CC-BY-SA license would be desirable.
Ubuntu – What license are the Ubuntu wallpapers distributed under
licensewallpaper
Best Answer
The community wallpapers are distributed under a CC-BY-SA 3.0 license.
This information is on disk in
/usr/share/doc/ubuntu-wallpapers-trusty/copyright