sudo yum install java-1.8.0-openjdk.x86_64
rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
vi /etc/yum.repos.d/elasticsearch.repo
Paste
[elasticsearch-5.x]
name=Elasticsearch repository for 5.x packages
baseurl=https://artifacts.elastic.co/packages/5.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md
yum install elasticsearch
vi ~/.ssh/bash_profile
export ES_HEAP_SIZE=10g
chkconfig --add elasticsearch
chkconfig elasticsearch on
service elasticsearch start