Hadoop 命令行最常用指令篇：

1.ls (list directory)

Usage:hadoop fs -ls [R]

Option: -R => 递归显示

2.mkdir (make directory)

Usage:hadoop fs -mkdir [-p]

Takes path uri's as argument and creates directories.

Options: -p make parent file => 当给的路径含有不存在的父目录时，递归创建目录

3.put (put local files to hdfs)

Usage:hadoop fs -put URI

4.get(make directory)

Usage:hadoop fs -get URI

4.rm(remove directory or file)

Usage:hadoop fs -rm [-f] [-r |-R] URI [URI ...]

Options:

-f => force 强制删除，不给提示。-r |-R => recursively 递归删除所有目录中的文件。　　

Warning: hadoop fs -rm-rf不能连在一起写，需要一个个给出：hadoop fs -rm-r -f

4.mv(move directory or file)