修改/etc/nginx/sites-available/default

修改文件

server {
       listen 80;
       server_name example1.com;
       return 301 https://example2.com$request_uri;
         }

列出目录下的文件

        server_name _;
        autoindex on;
        autoindex_exact_size off;
        autoindex_format html;
        autoindex_localtime on;

之后

sudo  nginx -s reload