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外部网站选读。
Questions and help
Unix & Linux Stack Exchange is a question and answer site for users of GNU/Linux. This site is all about getting answers.
Ask Ubuntu is a question and answer site for Ubuntu users. Even for users of different distributions of GNU/Linux this can be a helpful resource for finding answers.
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The Free Software Foundation defends and advocates the very concept of free software that gave birth to GNU/Linux.
注意:这些链接仅是推荐阅读,非商业用途。