July 2014
Intermediate to advanced
254 pages
5h 24m
English
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Exploring HDFS commands
To perform filesystem related tasks, the commands begin with hdfs dfs. The filesystem commands have been designed to behave similarly to the corresponding Unix/Linux filesystem commands.
What is a URI? URI stands for Uniform Resource Identifier. In the commands that are listed as follows, you will observe the use of URI for file locations. The URI syntax to access a file in HDFS is hdfs://namenodehost/parent/child/<file>.
Commonly used HDFS commands
The following are some of the most commonly used HDFS commands:
ls: This command lists files in HDFS.The syntax of the
lscommand ishdfs dfs -ls <args>. The following is the screenshot showing an example of thelscommand:cat: This command displays the contents of file/files in ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.