Merge pull request #1638 from GOLinux/master

Translating:20140915 Linux FAQs with Answers--How to find and remove obsolete PPA repositories on Ubuntu.md
Merge pull request #1639 from GOLinux/master

Translated:20140915 Linux FAQs with Answers--How to find and remove obsolete PPA repositories on Ubuntu.md
Merge pull request #1640 from GOLinux/master

Translating:20140915 Linux FAQs with Answers--How to expand an XFS file system.md
Merge pull request #1641 from GOLinux/master

Translated:20140915 Linux FAQs with Answers--How to expand an XFS File System.md
[translating] 20140902 Happy Birthday Email.md
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Merge pull request #1642 from zpl1025/master

[translating] 20140902 Happy Birthday Email.md
Merge pull request #1643 from CNprober/working

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Merge pull request #1644 from Vic020/master

Translated -20140915 Linux FAQs with Answers-
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