如果要部署服务器，用nginx，php-fpm，php，一定要注意用户问题，前面几篇文章，我们介绍了如何配置用户。
下面我们要注意的是，一定不要在root文件夹下面部署服务，否则会面临很多异样的问题。
下面我们就因为在root目录下面创建了服务，发生了找不到静态文件的问题，404
参考地址 nginx配置文件里user只能是root，否则报403错误
yum 一个全新的nginx，版本是1.12.2的
直接启动，浏览器输入localhost访问的nginx页面
1、当我将nginx.conf配置文件里root 路径改成/root/html/index.html
#mkdir /root/html
#echo hello > /root/html/index.html
(不用改访问目录权限。不放心对照原始成功的/usr/share/nginx/html/index.html的路径权限)
报错：
root@localhost nginx]# curl localhost
<html>
<head><title>403 Forbidden</title></head>
<body bgcolor="white">
<center><h1>403 Forbidden</h1></center>
<hr><center>nginx/1.12.2</center>
</body>
</html>
查看错误日志：
[root@localhost nginx]# tail -n30 error.log
2018/01/30 01:35:57 [error] 3511#0: *1 "/root/html/index.html" is forbidden (13: Permission denied), client: ::1, server: _, request: "GET / HTTP/1.1", host: "localhost"
2018/01/30 01:36:50 [error] 3567#0: *1 "/root/html/index.html" is forbidden (13: Permission denied), client: ::1, server: _, request: "GET / HTTP/1.1", host: "localhost"
2018/01/30 01:37:20 [error] 3640#0: *1 "/root/html/index.html" is forbidden (13: Permission denied), client: ::1, server: _, request: "GET / HTTP/1.1", host: "localhost"
2018/01/30 01:38:40 [error] 3640#0: *2 "/root/html/index.html" is forbidden (13: Permission denied), client: ::1, server: _, request: "GET / HTTP/1.1", host: "localhost"
2018/01/30 01:40:27 [error] 3878#0: *2 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such file or directory), client: ::1, server: _, request: "GET /favicon.ico HTTP/1.1", host: "localhost"
2018/01/30 01:40:27 [error] 3878#0: *2 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such file or directory), client: ::1, server: _, request: "GET /favicon.ico HTTP/1.1", host: "localhost"
2018/01/30 01:50:58 [error] 4590#0: *1 "/root/html/index.html" is forbidden (13: Permission denied), client: ::1, server: _, request: "GET / HTTP/1.1", host: "localhost"
2、再改，将nginx.conf里的user nginx改成
user root；
成功：
[root@localhost ~]# curl localhost
hello
3、不行，我不要将user 变成root，改回来：
user nginx；
重启后，报403的错误。
参考解答：https://stackoverflow.com/questions/31729212/nginx-root-index-html-forbidden-13-permission-denied
4、将访问目录换出root
我改成了/data/html/index.html
okokokoko
总结：用户和访问路径不符合。
指定root用户 -----访问路径随便
其他用户（nginx,www）----->访问路径就不可以在/root下