1、从官网下载elasticsearchDownload Elasticsearch | ElasticDownload Elasticsearch or the complete Elastic Stack (formerly ELK stack) for free and start searching and analyzing in minutes with Elastic.https://www.elastic.co/cn/downloads/elasticsearch2、新建用户，赋予密码，权限

useradd wyp -- 创建用户
passwd wyp -- 设置密码
chown -R wyp /opt/software/elasticsearch/elasticsearch-8.5.0 -- 授权
su wyp -- 切换用户

3、如果启动报错，There is insufficient memory for the Java Runtime Environment to continue

修改 /config/jvm.options 文件

-Xms512m
-Xms512m

4、设置 /config/elasticsearch.yml

xpack.security.enabled: false

5、进入到bin目录下，后台启动elasticsearch

./elasticsearch -d

6、查看 elasticsearch 是否启动成功

ps -ef | grep elasticsearch

7、输入命令 curl http://localhost:9200，出现以下内容，说明ES启动成功

{
  "name" : "aliyun",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "AAzU8FMzQvW8gC6rwhelVQ",
  "version" : {
    "number" : "8.5.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "c94b4700cda13820dad5aa74fae6db185ca5c304",
    "build_date" : "2022-10-24T16:54:16.433628434Z",
    "build_snapshot" : false,
    "lucene_version" : "9.4.1",
    "minimum_wire_compatibility_version" : "7.17.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "You Know, for Search"
}