Failure to do so might render your machine unusable, as it will reject even the root user if the NIS system fails.

未能这样做将可能导致计算机不能使用，因为如果NIS系统失败，甚至会拒绝root用户。

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For example, you can configure the nsswitch.conf file to look up host information in files, query the DNS, or use the NIS system to look up the information.

例如，可以将nsswitch . conf文件配置为在文件中查找主机信息、查询DNS或使用NIS系统查找该信息。

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NIS+ also extended the naming system so that databases were placed into a tree structure rather than a single domain, allowing for much more complicated and wider-ranging distribution.

NIS+ 还对命名系统进行了扩展，因此数据库将放入树形结构中（而不是单个域中），以便允许更为复杂、范围更广的分布。

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