使所有权DevinCrossman：www- code> sudo chown -R DevinCrossman：www-data。而站在vhost的根目录。

make the ownership DevinCrossman:www-data of your whole cake directory sudo chown -R DevinCrossman:www-data . while standing in the root of the vhost.

网络服务器（www-data的成员）需要能够在app / tmp中写入

the webserver (member of www-data) needs to be able to write in app/tmp