Hadoop 文件系统命令行基础

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] <paths>

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 <localsrc> uri

 

 

4.get(make directory)

usage: hadoop fs -get uri <localsrc> 

 

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)

usage: hadoop fs -mv uri [uri ...] <dest>

feature: 支持多个目录或文件移动