yum安装的nginx怎样添加多个站点？

/var/www/demoA.com
/var/www/demoB.com

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  65;
    #gzip  on;
    include /etc/nginx/conf.d/*.conf;　　　＃主要是在http内加入此行，如有则本环节
}

/etc/nginx/conf.d/demoA.conf
/etc/nginx/conf.d/demoB.conf

server {
    listen       80;
    server_name   www.demoA.com;
    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;
    root   /var/www/demoA.com/;
    if (!-e $request_filename){  　　＃　rewrite可根据网站需要增删
            rewrite ^/(.*) /index.php last;  
    }  
    location / {
        index  index.php index.html index.htm;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /var/www/demoA.com/;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}
//如果直接复制报错，则复制/etc/nginx/nginx.conf里面的server { ... }到第三步的两个配置文件中
//需要注意，复制nginx.conf里的配置后要删除掉default_server字符

systemctl restart nginx
//如果重启报错，则复制/etc/nginx/nginx.conf里面的server { ... }到第三步的两个配置文件中
//需要注意，删除掉default_server字符

vim /etc/hosts

127.0.0.1 www.demoA.com
127.0.0.1 www.demoB.com