nginx查看logs目录，提示访问权限：
[alert]: could not open error log file: open() "/usr/local/nginx/logs/error.log" failed (13: Permission denied)
2011/03/21 06:09:33 [emerg] 24855#0: mkdir() "/usr/local/nginx/client_body_temp" failed (13: Permission denied)
解决办法（设置nginx目录权限）：