-Arvados crunch scripts need to be added in a *crunch_scripts* subdirectory in the repository. If this subdirectory does not exist, first create it in the local repository and change to that directory:
-
-<notextile>
-<pre><code>~/tutorial$ <span class="userinput">mkdir crunch_scripts</span>
-~/tutorial$ <span class="userinput">cd crunch_scripts</span></code></pre>
-</notextile>
-
-Next, using @nano@ or your favorite Unix text editor, create a new file called @hash.py@ in the @crunch_scripts@ directory.
-
-notextile. <pre>~/tutorial/crunch_scripts$ <code class="userinput">nano hash.py</code></pre>
-
-Add the following code to compute the MD5 hash of each file in a collection