GN1 needs to clean up the following
GNRoot="/gnshare/gn"
find $GNRoot/web/tmp -mmin +100 -exec rm -rfv {} \;
find $GNRoot/web/image -mmin +100 -exec rm -rfv {} \;
mkdir -p $GNRoot/web/tmp
mkdir -p $GNRoot/web/image
Note that the -delete switch is much faster than -exec, so
find $GNRoot/web/image -mmin +100 -delete