列出HDFS下的文件：
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -ls /
Found 1 items
drwxr-xr-x - hadoop supergroup 0 2013-10-28 19:53 /tmp
列出/tmp文档中的文件：
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -ls /tmp
Found 1 items
drwxr-xr-x - hadoop supergroup 0 2013-10-28 19:53 /tmp/hadoop-hadoop
创建文件夹:
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -mkdir hello
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -ls /
Found 2 items
drwxr-xr-x - hadoop supergroup 0 2013-10-28 19:53 /tmp
drwxr-xr-x - hadoop supergroup 0 2013-10-28 21:33 /user
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -ls /user
Found 1 items
drwxr-xr-x - hadoop supergroup 0 2013-10-28 21:33 /user/hadoop
hadoop@dingqi-ubuntu:/opt/hadoop$ bin/hadoop fs -ls /user/hadoop
Found 1 items
drwxr-xr-x - hadoop supergroup 0 2013-10-28 21:33 /user/hadoop/hello