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+28 -0How To.rst
+- First install setuptools for Python to get easy_install: **sudo apt-get install python-setuptools**
+- Make sure that all mapper and reducer scripts located in DocIRHadoop/InvertIndex have permission for execution.
+- Export the path to the DocIrHadoop directory in PYTHONPATH environment variable: **export PYTHONPATH=/path/to/parent/of/DocIRHadoop:$PYTHONPATH**
+- At the first promt enter the full path of the location of the english-documents directory. Press Enter.
+- At this time you will see a lot of information of the execution of DocIRHadoop, especially for the MapReduce jobs.