Hadoop 2.2 Installation `.' no such file or directory

Question

I have installed Hadoop and HDFS using this tutorial

http://codesfusion.blogspot.com/2013/10/setup-hadoop-2x-220-on-ubuntu.html 

Everything is fine.

I am also able to create directories and use them using

hadoop fs -mkdir /tmp hadoop fs -mkdir /small 

I can also say

hadoop fs -ls / 

However I am following a tutorial in which the trainer does

hadoop fs -mkdir temp hadoop fs -ls 

now on my machine when I issue the above command it says

ls: `.': No such file or directory 

In my training video the command hadoop fs -ls works perfectly. Why should I specify the "/"?

Also I am getting this warning in all my commands

13/12/28 20:23:52 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 

But in my trainers video there is no such warning.

My configuration file is exactly as the tutorial above and I can also see all management UIs at

http://abhishek-pc:8042/ http://abhishek-pc:50070/ http://abhishek-pc:8088/ 

So my question is what is wrong with my configuration and why is my system behaving differently than the training video?

Answer 1

Well, your problem regarding ls: '.': No such file or directory' is because, there is no home dir on HDFS for your current user. Try

hadoop fs -mkdir -p /user/[current login user] 

Then you will be able to hadoop fs -ls

As per this warning WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable, please see my answer at this question

Answer 2

First:

hdfs dfs -mkdir /user 

then perform

hdfs dfs -mkdir /user/hduser