title: how to build a job jar for hadoop Mapreduce job in AWS
body: <p>I'm trying to run a mapreduce code example on AWS. This is the link for the code sample <a href="https://github.com/ScaleUnlimited/wikipedia-ngrams" rel="nofollow">https://github.com/ScaleUnlimited/wikipedia-ngrams</a></p>
  
  <p>However, I'm pretty new for these things. In fact, they did write in the Readme file that  I should build a job jar file from the code sample. But, still didn't get how could I build a job jar. </p>
  
  <p>I'm following also these videos that explain how to run a job in EMR <a href="http://www.youtube.com/watch?v=cAZur5maWZE&amp;list=PL080E1DEBCE5388F3" rel="nofollow">http://www.youtube.com/watch?v=cAZur5maWZE&amp;list=PL080E1DEBCE5388F3</a></p>
  
  <p>But they didn't tell also how to get this important jar file to start the work.</p>
  
  <p>Any help</p>