Merge pull request #1920 from geekpi/master

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PUB:20140922 How to use logrotate to manage log files in Linux

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PUB:20141017 Linux FAQs with Answers--How to create a video DVD on Linux desktop

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PUB:20140829 6 Interesting Funny Commands of Linux (Fun in Terminal) – Part II

@wangjiezhe
PUB:20141009 Linux or UNIX wget command with practical examples

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[translating]20141027 Handy Disk Image Tools
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Merge pull request #1921 from barney-ro/master

[translating]20141027 Handy Disk Image Tools
Merge pull request #1922 from KayGuoWhu/master

[Translating]20141029 Linux FAQs with Answers--How to open a port in the firewall on CentOS or RHEL
[Translating] Linux FAQs with Answers--How to install REMI repository on CentOS or RHEL