先安装：
sudo apt-get install nginx php5-fpm -y
然后编辑配置文件：
/etc/nginx/site-available/default
找到“location ~ \.php$”的地方，5行取消注释，变成这样：
location ~ \.php$ {
#fastcgi_split_path_info ^(.+\.php)(/.+)$;
## NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
#
## With php5-cgi alone:
#fastcgi_pass 127.0.0.1:9000;
## With php5-fpm:
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
启动nginx：
sudo service nginx start