cd /home/forlinx/Downloads/hadoop-1.2.1/bin
hadoop dfsadmin -safemode get/leave/enter
hadoop dfs -ls /
hadoop dfs -mkdir /test
hadoop dfs -put ../LICENSE.txt /test/license.txt
hadoop dfs -dus /test
hadoop dfs -cat /test/license.txt
hadoop dfs -get /test/license.txt ../aaa.txt
hadoop dfs -rm /test/license.txt
hadoop dfs -rmr /test
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