1. 新建404页面：404.html，并在<head>标签中加入代码：
<script type="text/javascript" charset="utf-8"> function gotoInd(){window.location.href="/"}setTimeout("gotoInd()",1);</script>
2. 在网站根目录下新建close.html：
<!DOCTYPE html> <html> <meta charset="UTF-8"> <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0" name="viewport"> <body> <div style="height: 28px;display: flex;flex-direction: row;align-items: center;justify-content: center;border-radius: 2px;margin-top:300px;">网页更新维护中......</div> </body> </html>
3.配置Nginx服务器：
server
{
listen 80;
server_name abc.com 127.0.0.1;
#index index.php index.html index.htm default.php default.htm default.html;
index 404.html; //修改此处
root /www/wwwroot/haizhu.com.cn;
#SSL-START SSL相关配置，请勿删除或修改下一行带注释的404规则
#error_page 404/404.html;
#SSL-END
#ERROR-PAGE-START 错误页配置，可以注释、删除或修改
error_page 404 /404.html; //修改此处
#error_page 502 /502.html;
#ERROR-PAGE-END