You can use a bash script to do it:
#!/bin/bash # Don't screw us up with spaces! IFS=$'\n'; set -f DIRS=$(find . -type d -name "rules") for i in $DIRS; do set +f rm $i/*.pdf done set +f This iterates through the directories you find in your find command and removes the pdf's under each directory.
The line IFS=$'\n' is to cope with spaces in file names, and set -f is to cope with wildcard characters. Of course, this is assuming you don't have newlines in any of your filenames. If you do, the solution will become a lot more complicated.
