The pam_permission module checks for the existence of an optionally specified file and then reads the file to determine if a user/group is granted/denied access.

pam_permission 模块会检查是否存在选择性指定的文件，然后读取此文件来确定某个用户/组是否被赋予/拒绝访问。

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For example, access should be set so that the user owning the file has read and write privileges, the group has read-only privileges, and other users on the system are denied access to the file.

比如，访问也许被设为：用户拥有某文件的读写权限，而组拥有该文件的只读权限，并且该文件拒绝这个系统上的其他用户访问。

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Access denied. You do not have permission to access this file.

拒绝访问。您没有访问此文件的权限。

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