Added Hadoop to Software Requirements

Author: Thomas Weise

README.md

@@ -120,6 +120,10 @@ In order to build and compile our [examples](http://github.com/thomasWeise/distr
 
 Under Linux, you can install the required files via `sudo apt-get install mpich libmpich-dev`.
 
+### 2.9. Hadoop (also `ssh` and `rsync`)
+
+In order to test our Hadoop examples, we now need to set up a single-node Hadoop cluster. We therefore follow the guide given at [http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html](http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html). We need to install pre-requisits such as `ssh` and `rsync`. In the [Hadoop example readme](http://github.com/thomasWeise/distributedComputingExamples/tree/master/hadoop/README.md), we provide the installation guide for Hadoop 2.7.2 Linux / Ubuntu. It boils down to downloading and installing Hadoop from one of the mirrors provided at [http://www.apache.org/dyn/closer.cgi/hadoop/common/](http://www.apache.org/dyn/closer.cgi/hadoop/common/), plus following the guidelines of the linked tutorial.
+
 ## 3. Licensing
 
 This work has purely educational purposes. Besides everything mentioned below, for anything in this repository, I impose one additional licensing condition: The code must never be used for anything which might violate the laws of Germany, China, or the USA. This also holds for any other file or resource provided here.

hadoop/README.md

@@ -54,7 +54,7 @@ Under Linux, you can also simply run `make_linux.sh` in this project's folder to
 
 ### 2.4. Setting Up a Single-Node Hadoop Cluster
 
-In order to test our example, we now need to set up a single-node hadoop cluster. We therefore follow the guide given at [http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html](http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html). Here we provide the installation guide for Hadoop 2.7.2 Linux / Ubuntu.
+In order to test our example, we now need to set up a single-node Hadoop cluster. We therefore follow the guide given at [http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html](http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html). Here we provide the installation guide for Hadoop 2.7.2 Linux / Ubuntu.
 
 #### 2.4.1. Download, Unpacking, and Setup