Merge remote-tracking branch 'LCTT/master'

sources/tech/20190805 How to Install and Configure PostgreSQL on Ubuntu.md

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 作者：[Sergiu][a]
 选题：[lujun9972][b]
-译者：[译者ID](https://github.com/译者ID)
+译者：[lnrCoder](https://github.com/lnrCoder)
 校对：[校对者ID](https://github.com/校对者ID)
 
 本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出

sources/tech/20191005 Use GameHub to Manage All Your Linux Games in One Place.md

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sources/tech/20191013 Object-Oriented Programming and Essential State.md

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