#!/bin/bash
#The 'ls' command must have the files to be nulled
#Be sure to execute the 'ls' command to determine if the correct files are to be nulled.
#The example will null all users .procmailrc

        for i in $( ls /home/sites/*/users/*/.procmailrc ); do
            echo item: $i
            cat /dev/null > $i
            cat $i
        done