Facter 介绍
A cross-platform Ruby library for retrieving facts from operating systems.
Supports multiple resolution mechanisms, any of which can be restricted to
working only on certain operating systems or environments. Facter is
especially useful for retrieving things like operating system names, IP
addresses, MAC addresses, and SSH keys.
一种跨平台的Ruby库检索事实操作系统。支持多种解决机制，任何可以限制只对某些作业系统或环境。因子是特别有用的检索像操作系统的名称， IP地址，
MAC地址，和SSH密钥。
It is easy to extend Facter to include your own custom facts or to include
additional mechanisms for retrieving facts.
这是易于扩展因子，包括您自己的自定义的事实或增列机制检索事实。