how to clean unused latex images

clean.sh

vim /usr/local/texlive/2016/texmf.cnf

max_print_line=2000
error_line=254
half_error_line=238


#!/bin/bash

for image_file in $(find Part_1/Chpt_9_Generator_and_Descriptor/figures -type f)
do
if grep $image_file *.log -c > 1
then
        echo "File $image_file is in use."
else
        echo "File $image_file is not in use."
        rm "$image_file"
fi
done

for image_file in $(find Part_1/Chpt_10_A_Tale_of_Three_Families/figures -type f)
do
if grep $image_file *.log -c > 1
then
        echo "File $image_file is in use."
else
        echo "File $image_file is not in use."
        rm "$image_file"
fi
done