访问根目录 404

nginx 错误日志

log2015/03/21 12:26:59 [crit] 2341#0: *54 stat() "/home/vagrant/wwwroot/tt.net/index.php" failed (13: Permission denied)

文件是存在的

bash[root@vagrant-centos65 conf]# cat /home/vagrant/wwwroot/tt.net/index.php
<?php
require __DIR__ . '/system/bootstrap.php';
...

目录权限777

bash[root@vagrant-centos65 tt.net]# ls -la
total 48
drwxrwxrwx 1 vagrant vagrant  4096 Mar 21 12:04 .
drwxrwxrwx 1 vagrant vagrant  4096 Mar 21 12:04 ..
drwxrwxrwx 1 vagrant vagrant  4096 Mar 21 12:08 .git
-rwxrwxrwx 1 vagrant vagrant   316 Nov 20 17:15 .gitignore
-rwxrwxrwx 1 vagrant vagrant   169 Oct 31 16:27 .htaccess
drwxrwxrwx 1 vagrant vagrant  4096 Mar 21 12:04 .idea
-rwxrwxrwx 1 vagrant vagrant    49 Nov 20 17:32 index.php

这是啥问题？