Hello World Job

• Step1: creating a file

J$ cat>file.txt
hi how are you
how is your job
how is your family
what is time now
what is the strength of hadoop
ctrl+d(to save and exit)

• Step2: loading file.txt from local file system to HDFS

J$hadoop fs -put file.txt file

• Step3: Writing programs

DriverCode.java
MapperCode.java
ReducerCode.java

• Step4: Compiling all above .java files

J$javac -classpath $HADOOP_HOME/hadoop-core.jar *java

• Step5: creating jar file

J$jar cvf test.jar *.class
*.class: all * files will be taken

• Step6: running above test.jar on file(which is there in HDFS)

J$hadoop jar test.jar DriverCode file TestOutput

The above step's screenshot will available soon!