操作系统环境CentOS8，登陆账户root
1、从elasticsearch官网下载elasticsearch最新版elasticsearch-7.16.2-linux-x86_64.tar.gz
2、拷贝elasticsearch-7.16.2-linux-x86_64.tar.gz到/usr/local/tmp目录下
3、在/usr/local目录下执行命令：mkdir elasticsearch
4、在/usr/local/tmp目录下执行命令：tar xf elasticsearch-7.16.2-linux-x86_64.tar.gz
5、将elasticsearch拷贝到/usr/local/elasticsearch目录下，执行命令：mv elasticsearch-7.16.2/* /usr/local/elasticsearch
6、创建用户elasticsearch：adduser elasticsearch
7、设置密码：passwd elasticsearch
8、将用户elasticsearch赋给/usr/local/elasticsearch目录：chown -R elasticsearch /usr/local/elasticsearch
9、切换目录到/usr/local/elasticsearch/bin：cd /usr/local/elasticsearch/bin
10、切换用户到elasticsearch：su elasticsearch
11、启动elasticsearch：./elasticsearch -d
