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> 

5.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

6.mv(move directory or file)

Usage: hadoop fs -mv URI [URI ...] <dest>

Feature: 支持多个目录或文件移动