README.md

Hadoop命令

1、查看指定目录下内容

hadoop dfs -ls [文件目录]
# eg: hadoop dfs –ls /user/miaoyc.pt

2、打开某个已存在文件

hadoop dfs -cat [file_path]
# eg:hadoop dfs -cat /user/wangkai.pt/data.txt

3、将本地文件存储至hadoop

hadoop fs -put [本地地址] [hadoop目录]
hadoop fs -put /home/t/file.txt  /user/t   
(file.txt是文件名)

4、将本地文件夹存储至hadoop

hadoop fs -put [本地目录] [hadoop目录] 
hadoop fs -put /home/t/dir_name /user/t
(dir_name是文件夹名)

5、将hadoop上某个文件down至本地已有目录下

hadoop fs -get [文件目录] [本地目录]
hadoop fs -get /user/t/ok.txt /home/t