Install Elasticsearch on Centos 7.1

1. Download Current Java Runtime Environment from: http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html
2. sudo rpm -Uvh jre-8u45-linux-x64.rpm
3. java -version
4. sudo rpm -Uvh https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.6.0.noarch.rpm
5. Define network.host: localhost in /etc/elasticsearch/elasticsearch.yml
6. sudo systemctl daemon-reload
7. sudo systemctl enable elasticsearch.service
8. sudo systemctl start elasticsearch.service
9. Execute curl -XGET 'http://localhost:9200/_cluster/health?pretty=true' to make sure the server is up and running