author：headsen chen
data ：2017-12-04 18:00:57
notice：created by chen himself and not allowed to copy ,or you will counte questions of law.
install steps:
yum -y remove java
yum -y install java
rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
vim elasticsearch.repo
[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
yum install elasticsearch -y
/bin/systemctl daemon-reload
/bin/systemctl enable elasticsearch.service
systemctl start elasticsearch.service
systemctl status elasticsearch.service
netstat -plnt |grep java -------------------------------------- 要等一分钟才有数据
lsof -i :9200 ------------------------------------------------ 要等一分钟才有数据
cat /var/log/elasticsearch/elasticsearch.log