wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.1-x86_64.rpm

sudo rpm --install elasticsearch-7.9.1-x86_64.rpm

sudo chkconfig --add elasticsearch

sudo -i service elasticsearch start
sudo -i service elasticsearch stop

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

sudo systemctl start elasticsearch.service
sudo systemctl stop elasticsearch.service

打开9200 端口

测试下面地址：

 curl -X GET "localhost:9200/?pretty"

输出结果

[root@ecs-e56a-0004 ~]# curl -X GET "localhost:9200/?pretty"
{
  "name" : "ecs-e56a-0004",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "l3amy67MRQWLzsfRNLDVww",
  "version" : {
    "number" : "7.8.1",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "b5ca9c58fb664ca8bf9e4057fc229b3396bf3a89",
    "build_date" : "2020-07-21T16:40:44.668009Z",
    "build_snapshot" : false,
    "lucene_version" : "8.5.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}