1.打开阿里云的服务器连接会弹出linux服务器的页面
切换成root用户：sudo su root
输入命令：
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.12.1-linux-x86_64.tar.gz wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.12.1-linux-x86_64.tar.gz.sha512 shasum -a 512 -c elasticsearch-7.12.1-linux-x86_64.tar.gz.sha512 tar -xzf elasticsearch-7.12.1-linux-x86_64.tar.gz cd elasticsearch-7.12.1/
