Commands in HDFS :

           Creating Directory in HDFS
           ->hadoop fs –mkdir /user/systemname/foldername
                       OR
           ->hadoop fs –mkdir foldername

           Delete a Folder in HDFS
           ->hadoop fs –rmr /user/systemname/foldername
                       OR
           ->hadoop fs –rmr foldername
           
           Delete a File in HDFS
           ->hadoop fs –rm /user/systemname/foldername/filename
                       OR
           ->hadoop fs –rm foldername/filename
           
           Copying a file from one location to another location in HDFS
           ->hadoop fs –cp source destination
           
           Moving a File from one location to another location in HDFS
           ->hadoop fs –mv source destination
           
           Putting a file in HDFS
           ->hadoop fs –put /source /destination
                       OR
           ->hadoop fs –copyFromLocal /source /destination
           
           Getting a file in HDFS
           ->hadoop fs –get /source /destination
                       OR
           ->hadoop fs –copyToLocal /source /destination
           
           Getting list of file in HDFS
           ->hadoop fs –ls
           
           Reading content of a file in HDFS
           ->hadoop fs –cat filelocation (head, tail)
           
           Checking HDFS condition
           ->hadoop fsck
           
           Getting Health of Hadoop
           ->sudo –u hdfs hadoop /
           ->sudo –u hdfs hadoop /sourcepath –files –blocks –racks
           
           UnZip a file in Hadoop
           -tar xzvf  filename