1、更新软件源

sudo apt-get update
sudo apt-get upgrade

2、安装Nginx

sudo apt-get install nginx

3、启动Nginx

sudo systemctl start nginx

4、安装Php7.3

sudo apt-get install php7.3-fpm

5、配置Nginx，使其支持Php

sudo nano /etc/nginx/sites-enabled/default

代码修改如下

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    root /var/www/html;
    index index.php index.html index.htm;
    server_name _;

    location / {
        try_files $uri /index.php$is_args$args;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
    }

    location ~ /\.ht {
        deny all;
    }
}

6、每次修改配置后都需要重新加载Nginx，使配置生效

sudo systemctl reload nginx

7、创建index.php

sudo nano /var/www/html/index.php

加入代码如下：

<?php
    phpinfo();
?>