Merge pull request #1780 from geekpi/master

[Translating] How to manage configurations in Linux with Puppet and Auge...
Merge pull request #1781 from geekpi/master

[Translated] How to manage configurations in Linux with Puppet and Augea...
PUB:20140915 Linux FAQs with Answers--How to remove PPA repository from command line on Ubuntu

@Vic020
PUB:20140808 How to install Puppet server and client on CentOS and RHEL

@blueabysm
PUB:20140930 Check If Your Linux System Is Vulnerable To Shellshock And Fix It

@geekpi
PUB:20140925 Linux FAQs with Answers--How to detect a Linux distribution in Perl

@geekpi
翻译完成
Merge branch 'master' of https://github.com/LCTT/TranslateProject

merge from LCTT.
PUB:20140926 How To Reset Root Password On CentOS 7

@su-kaiyao
Merge pull request #1782 from runningwater/master

翻译完成
shaohaolin translating
Merge pull request #1783 from shaohaolin/master

shaohaolin translating
[Translating] How to monitor server memory usage with Nagios Remote Plugin Executor (NRPE)