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Error: Not a valid JAR

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I´m using the CDH version 5.10.0 and I´m trying to run wordcount.

When entering the path from my coursera-turorial, which is based on version 5.4.2, (hadoop jar /usr/jars/hadoop-examples.jar wordcount), I do get the error: Not a valid JAR. - Seems as if I have the wrong path.


Sorry for this low-level-question, but how can I figure out the right path? Is there a possibility to get an overview about the JARs and their paths?



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