WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform

hduser@s-Studio-1555:~$ hadoop fs -ls /

15/12/14 21:51:41 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

our problem regarding ls: '.': No such file or directory' is because there is not 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