Shell脚本监控目录内文件改动

#! /bin/bashwebroot="/home/www/"cp /dev/null rsync_fileif [ ! -f file.md5 ];then  find $webroot -type f -exec md5sum {} /; >>file.md5else  for file in $(md5sum -c file.md5|awk -F':' '/FAILED/{print $1}')    do      if [ -f $file ];then      filename_z=$(echo $file|sed 's#/#///#g')      sed -i "/ $filename_z/"d file.md5      md5sum $file >> file.md5      echo $file >> rsync_file      else      echo $file >>rsync_rm      fi    done  for newfile in $(find $webroot -type f)    do      grep $newfile file.md5 >/dev/null 2>&1      if [ $? -gt 0 ];then      md5sum $newfile >> file.md5      echo "$newfile" >> rsync_file      fi    donefor rfile in $(cat rsync_file)dorsync -avzp $rfile /home/www3/done