такая:
hadoop jar hadoop-examples.jar wordcount /usr/lib/hadoop-0.20-mapreduce/input /usr/lib/hadoop-0.20-mapreduce/output
hadoop jar hadoop-examples.jar wordcount input output
hadoop jar hadoop-examples.jar wordcount hdfs://0.0.0.0:8020/home/training/input hdfs://0.0.0.0:8020/home/training/output
hadoop jar hadoop-examples.jar wordcount /home/training/input /home/training/output
hadoop fs -mkdir /home/training/input