今天在做Drupal6的时候，发现一个问题，Drupal6的default目录的权限会被改成不可写。所以造成建立modules之类的文件夹失败。需要chmod +w default 才可以建立新的文件夹。
网上查了一下，找到了这个结果
Sites/Default folder permissions keep reverting!
结论是，drupal会不断的修改这个目录权限，以保证settings.php的安全，但是并不影响子文件夹的权限。所以default/files的权限不会因为这个改变。
所以当把drupal上传上去的时候，在安装前修改settings.php的时候就顺便把modules和themes目录建立好，省得以后改权限麻烦。呵呵。
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