1.yum install -y pcre-devel openssl-devel gcc cURL，输入该命令按回车键安装依赖库
2.wget https://openresty.org/download/openresty-1.21.4.1.tar.gz，输入该命令按回车键
3.tar -zxvf openresty-1.21.4.1.tar.gz，输入该命令按回车键
4.cd openrestyy-1.21.4.1/，输入该命令按回车键
5../configure，输入该命令按回车键
6.make，输入该命令按回车键
7.make install，输入该命令按回车键即可
