nginx+php+mysql+vsftp服务器之注意点
一.nginx的启动
在 Unix-like 系统上， 非 root 用户只能使用 1024 之上的端口。所以， 默认的 80 端口就无效了。网上查了下主要有两种方法，一种是利用端口映射nginx配置如8080端口，同时将80端口影射到8080上，还有一种办法是直接通过80端口启动，命令如下：
cd /opt/nginx/sbin
方法一：
所有用户都可以运行（因为是755权限，文件所有者：root，组所有者：root）
chown root:root nginx
chmod 755 nginx
chmod u+s nginx
二.php的数据目录的权限
PHP工程目录必须是启动php用户，否则access denied
三.mysql和php同用户，否则访问不了mysql，却这少那
四.FTP服务上传的文件，文件上传后的权限自然是FTP用户的，而用root用户拷贝后，文件还是保持不变，需要chown才能改变，PHP用户和FTP用户不一致的时候，这是个问题
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