i had done allot of searching and couldn't find a random wallpaper script that behaved the way i wanted it to. so i wrote my own and thought i would share it just in case some one else is looking for what i was. i am also a little proud of this being that i am not really a programmer.
first off i wanted a random wallpaper changer. there are a number of options out there to do just this. but i also wanted to be sure that all my wonderful wallpapers had equal screen time. basically i wanted to make a randomized "play list" of wallpapers to go through one at a time and then reshuffle when the last one was "played". randomizing the play list was the hard part. in the end i installed the randomize-lines package. which does exactly what i needed. so here is the code:
copy and past the code into your text editor of choice. save it with a unique name! i used wpc(for WallPaper Changer)
#file locations using full path for crontab execution
ImagePath=/home/USERNAME/pictures/wallpaper #directory of images to use
DataFile=/home/USERNAME/bin/wpc.data #where to keep the list of images
TempFile=/home/USERNAME/bin/wpc.temp #temp file to use in removing a line from the list of images
#function to make the randomized list of images
ls $ImagePath > $DataFile #get a list of images
rl $DataFile > $TempFile #mix them all up
mv $TempFile $DataFile #make the mixed up list the list to use
#function to change the wallpaper, and update the list of images
ImageFile=$(sed -n '1p' $DataFile) #get the first line from the list of images
gconftool -t string -s /desktop/gnome/background/picture_filename "$ImagePath/$ImageFile" #change the wallpaper
gconftool -t string -s /desktop/gnome/background/picture_options "centered" #it's how i like my wallpapers
sed -e '1d' $DataFile > $TempFile #remove the image we just used
mv $TempFile $DataFile #update the image list
if test ! -s "$DataFile" #if the image list doesn't exist we make it
change_wall #actually change the wallpaper
be sure to change out the USERNAME to your actual user name, and make sure the directory names are correct.
make it executable by either or and set up crontab to run it as you see fit . i go with every 10 minutes. questions? comments? suggestions? it is a forum so feel free to post a reply.