Script to check for changes in log

import.sh

file1= "..." # old log file
file2= "..." # new log file
url= "..."
mail= "..."

rm ${file1}

mv ${file2} ${file1}

nice curl ${url} > ${file2} # execute process and write output in file2

expr1=`md5sum ${file1}`
expr2=`md5sum ${file2}`

if [ "${expr1:0:32}" != "${expr2:0:32}" ]
then
        sendmail "${mail}" < ${file2}
fi