XFCE instructions:

If your Desktop does not reload automatically you can set up a recurring 'cron job' to reload on schedule.

After following the directions in the readme file, open a terminal and enter the following commands:



crontab -e

#...and use your arrow keys to go to the bottom of the file and add the following line:

*/15 * * * * DISPLAY=:0.0 xfdesktop --reload > /dev/null 2>&1

#Then, to save the file:

- ctrl+x

- Y
-
 <press the enter key>

#...note, the /15 refers to the change frequency time - in the example above, it will cycle every 15 minutes. To make it cycle for example every 5 minutes, use "/5" instead.

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From Toz, Ubuntu forums, 8/31/2012, http://ubuntuforums.org/archive/index.php/t-2050412.html