Disk quota problem: batch delete users cache folder

Hi! Need your help. How can I delete the cache folder of multiple user home directories via automatically executed shell script on a Mac OS X Server? Example: The userdata are stored on a Xsan Volume like this: /Volumes/Xsan/userdata/mike /Volumes/Xsan/userdata/peter /Volumes/Xsan/userdata/robert /Volumes/Xsan/userdata/dave /Volumes/Xsan/userdata/michael ... etc. (total 1629 user home directories) and in every userfolder is the same folder structur: Desktop, Documents, Library, Movies, Music, Pictures and Public The folder which should be removed is: /username/Library/Caches The script should go through all 1629 user home directories and delete the entire cache folder. I would like to run this script automatically as a cron job in the night. I'm open for any ideas to solve this disk quota problem. Thanks in advance for your help. With best regards, Mike