Merge branch 'master' into 1786-replace-jekyll-with-zenweb

[arvados.git] / doc / user / tutorials / running-external-program.textile

diff --git a/doc/user/tutorials/running-external-program.textile b/doc/user/tutorials/running-external-program.textile
index a1a7873a385a2ddd104d2b0ed9b640554f0a35cb..34cb71ab757b67ae3f639168c702b1135645703e 100644 (file)
--- a/doc/user/tutorials/running-external-program.textile
+++ b/doc/user/tutorials/running-external-program.textile
@@ -12,14 +12,16 @@ This tutorial demonstrates how to use Crunch to run an external program by writt
 
 *This tutorial assumes that you are "logged into an Arvados VM instance":{{site.basedoc}}/user/getting_started/ssh-access.html#login, and have a "working environment.":{{site.basedoc}}/user/getting_started/check-environment.html*
 
+In this tutorial, you will use the external program @md5sum@ to compute hashes instead of the built-in Python library used in earlier tutorials.
+
 Start by entering the @crunch_scripts@ directory of your git repository:
 
 <notextile>
 <pre><code>$ <span class="userinput">cd you/crunch_scripts</span>
 </code></pre>
 </notextile>
-
-Next, using your favorite text editor, create a new file called @run-md5sum.py@ in the @crunch_scripts@ directory.  Add the following code to compute the md5 hash of each file in a collection:
+ 
+Next, using your favorite text editor, create a new file called @run-md5sum.py@ in the @crunch_scripts@ directory.  Add the following code to use the @md5sum@ program to compute the hash of each file in a collection:
 
 <pre><code class="userinput">{% include run-md5sum.py %}</code></pre>