[hadoop]成功搭建Hadoop集羣后簡單實驗

1>  檢查對HDFS的訪問(在namenode上操做)        #./hadoop-0.20.2/bin/hadoop fs -ls 2>  hadoop中的文件系統操做        #./hadoop-0.20.2/bin/hadoop fs -mkdir  test        #./hadoop-0.20.2/bin/hadoop fs -ls  test        #./h

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