首先，下载 Grails（参见 参考资料），将其解压缩，然后设置一个指向安装目录的 GRAILS_HOME 环境变量来对环境进行配置。

First, download Grails (see Resources), unarchive it, and configure your environment by setting a GRAILS_HOME environment variable that points to your installation directory.

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将下载方法设置为 Private，并将文件系统路径设置为不在目录 /var/www/htdocs 中的位置。

Set the download method to Private, and be sure to set the file system path to a location that is not inside the directory /var/www/htdocs.

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设置自定义位置的另一个原因是：运行应用程序的用户对公共语言运行时用作下载缓存的目录位置不具有写访问权限。

Another reason to set a custom location is when users running your application do not have write access to the directory location the common language runtime USES for the download cache.

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