I realised that I had to do an online search myself and found this page:
http://ubuntuforums.org/showthread.php?t=1767979 I did #3: $sudo cp wallpaper_changer.sh ~/.config/autostart/ and this script: # Script to randomly set Background from files in a directory while true;do # Directory Containing Pictures DIR0="/home/username/Pictures" DIR1="/home/username/1000 HD Wallpapers (By Mellori Studio)/Animals" DIR2="/home/username/1000 HD Wallpapers (By Mellori Studio)/Nature" # Command to Select a random jpg file from directory # Delete the *.jpg to select any file but it may return a folder PIC=$(find "$DIR0" "$DIR1" "$DIR2" -type f -name "*.jpg" | shuf -n1) # Command to set Background Image gsettings set org.mate.background picture-filename "$PIC" # specify how long to wait in seconds between changes sleep 120 done After rebooting, this works! Yeah ;-) Thanks very much.
