New Ubuntu and Linux Mint wallpaper. Lovely green field and cows. Posted: August 17, 2013. At: 10:13 PM. This was 4 years ago. Post ID: 6138 Page permalink: http://securitronlinux.com/ubuntu-2/new-ubuntu-and-linux-mint-wallpaper-lovely-green-field-and-cows/ John Cartwright August 17, 2013 1 Comment Green field Ubuntu wallpaper. This is a lovely green Ubuntu wallpaper for your desktop. This is an amazing wallpaper with good detail in the background.