title: Tool to copy file from given 'x' (starting) offset to given 'y' (ending) offset
body: <p>Is there any tool to copy a file from the given starting offset to the given (end) offset. I also want to confirm that the tool has copies specified bytes rightly by running md5sum. Some thing like this</p>
  
  <pre><code>   1) Copy source file starting from 100 byte till 250th byte
          $cp /path/to/source/file /path/to/dest/file -s 100 -e 250
  
     2) Create md5sum of the source file starting from 100byte till 250th byte
          $md5sum /path/of/src/file -s 100 -e 250
           xxxxxx-xxxxx-xxxxx-xxxx-xx
  
     3) Confirm that destination file created from step 1 is right by comparing the md5sum generated from step 2.
          $md5sum /path/of/dest/file
           xxxxxx-xxxxx-xxxxx-xxxx-xx
  </code></pre>
  
  <p>I know md5sum doesn't have the option of -s and -e but I would like to confirm by some tool given the source file and the destination file. Thanks in advance</p>