easyhadoop：failed to open stream:Permission denied in /var/www/html/index.php

今天又重新部署了下easyhadoop，结果apache后台服务器报这个错误：

[Fri Dec 13 10:32:41 2013] [notice] SIGHUP received.  Attempting to restart
[Fri Dec 13 10:32:41 2013] [notice] Digest: generating secret for digest authentication ...
[Fri Dec 13 10:32:41 2013] [notice] Digest: done
[Fri Dec 13 10:32:41 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 configured -- resuming normal operations
[Fri Dec 13 10:33:00 2013] [error] [client 192.168.137.119] PHP Warning:  require_once(/var/www/html/system/core/CodeIgniter.php): failed to open stream: Permission denied in /var/www/html/index.php on line 202
[Fri Dec 13 10:33:00 2013] [error] [client 192.168.137.119] PHP Fatal error:  require_once(): Failed opening required '/var/www/html/system/core/CodeIgniter.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/index.php on line 202

结果搞了很久，哎，其实就是权限问题，我就不明白了，我都是一模一样的安装，系统都是一样的，居然安装后的权限不一样。仔细查看下，还居然真是权限不一样，晕。参考这里
http://stackoverflow.com/questions/5326531/php-warning-unknown-failed-to-open-stream

直接运行：

chmod -R 755 /var/www

即可，默认是root用户；

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