Merge pull request #37 from LCTT/master

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Update 20140812 How to set up a USB network printer and scanner server on Debian.md
Merge pull request #1868 from GOLinux/master

[Translating] 20140812 How to set up a USB network printer and scanner server on Debian.md
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[Translated] 20140812 How to set up a USB network printer and scanner server on Debian.md
Merge pull request #1869 from GOLinux/master

[Translated] 20140812 How to set up a USB network printer and scanner server on Debian.md
20141021-1 选题
20141021-2 选题
20141021-3 选题 ，和前面的那个 Ubuntu 15.04 的文章可以二选一，或者综合
[Translated] How to configure peer-to-peer VPN on Linux

Signed-off-by: Felix Yan <felixonmars@gmail.com>
20141021-4 选题
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20141021-6 选题
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[Translating] Debian 7.7 Is Out with Security Fixes
[Translated] Debian 7.7 Is Out with Security Fixes
Merge pull request #1872 from geekpi/master

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