ElasticSearch installation on Centos 7

1. sudo vi /etc/yum.repos.d/elasticsearch.repo

2. [elasticsearch-6.x]

name=Elasticsearch repository for 6.x packages
baseurl=https://artifacts.elastic.co/packages/6.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md

3. 

sudo yum install elasticsearch

4. sudo systemctl start elasticsearch.service

sudo systemctl stop elasticsearch.service

To configure Elasticsearch to start automatically when the system boots up, run the following commands:

sudo /bin/systemctl daemon-reload
sudo /bin/systemctl enable elasticsearch.service