hadoop hdfs常用命令
hadoop fs -ls /user/deploy/recsys/workspace/ouyangyewei
查看ouyangyewei目录文件
hadoop fs -mkdir /user/deploy/recsys/workspace/ouyangyewei/input
在ouyangyewei目录下创建input文件夹
hadoop fs -rm /user/deploy/recsys/workspace/ouyangyewei/input/input.txt
删除input.txt文件
hadoop fs -rmr /user/deploy/recsys/workspace/ouyangyewei/input
删除input目录以及目录下的所有文件
hadoop fs -put ./input.txt /home/deploy/recsys/workspace/ouyangyewei/input
把当前目录下的input.txt文件复制到input目录下
hadoop fs -dus /data/share/trackinfo/ds=2014-05-12
查看文件 “/data/share/trackinfo/ds=2014-05-12”的大小（以字节为单位）
hadoop jar recommender-dm-1.0-SNAPSHOT-lib.jar com.yhd.ml.statistics.click.WordCount /home/deploy/recsys/workspace/ouyangyewei/input /home/deploy/recsys/workspace/ouyangyewei/output
运行Job，指定的jar包是recommender-dm-1.0-SNAPSHOT-lib.jar，主类是com.yhd.ml.statistics.click.WordCount，输入目录是input，输出目录是output
hadoop job -kill job_201403291618_274044
杀掉hadoop的job
