[hadoop]成功搭建Hadoop集群后简单实验

1>  检查对HDFS的访问(在namenode上操做)        #./hadoop-0.20.2/bin/hadoop fs -ls 2>  hadoop中的文件系统操做        #./hadoop-0.20.2/bin/hadoop fs -mkdir  test        #./hadoop-0.20.2/bin/hadoop fs -ls  test        #./h

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