20130930-1 选题

sources/Choosing a Journaling File System.md

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+Choosing a Journaling File System
+================================================================================
+In layman's terms, a computer file system is how a storage device such as a disk drive is able to store, retrieve, and manage files. File systems need to keep track of not only the bits that make up the file itself and where they are placed on the storage device, but also store information about the file. The file system also has to store the name of each file, how to organise files in a hierarchy, and keep metadata such as the file's modification date.
+
+Even though there are many different file systems available for Linux, most users pay little attention to which file system to use. They are often a forgotten friend. The choice of what file system to use depends on the situation; relevant factors to consider include compatibility, performance, resilience, the media being used, the size and number of the storage medium, features, and security considerations.
+
+A journaling file system is a special type of file system that maintains a tracking file, called a journal. The journal enables the system to repair any inconsistencies that may arise as a result of a system halted abnormally. It does this by keeping track of changes that are made before committing them to the main file system. In the event that the computer is not shut down properly, any data loss can be recreated. This type of file system is therefore less likely to suffer from corruption, and brings file systems back online quickly.
+
+To provide an insight into the quality of journaling file systems that are available, we have compiled a list of our top picks.
+
+Now, let's explore the journaling file systems at hand. For each title we have compiled its own portal page, providing a full description with an in-depth analysis of its features, together with links to relevant resources and reviews.
+
+- [ext3][1] 	Default file system for many popular Linux distributions
+- [XFS][2] 	Designed to maintain high performance with large files and file systems
+- [Btrfs][3] 	Checksumming Copy on Write File system
+- [ext4][4] 	Evolved from ext3 adding many notable features including extents
+
+--------------------------------------------------------------------------------
+via: http://www.linuxlinks.com/article/20130927180305497/JournalingFileSystems.html
+
+本文由 [LCTT][] 原创翻译，[Linux中国][] 荣誉推出
+
+译者：[译者ID][] 校对：[校对者ID][]
+
+[LCTT]:https://github.com/LCTT/TranslateProject
+[Linux中国]:http://linux.cn/portal.php
+[译者ID]:http://linux.cn/space/译者ID
+[校对者ID]:http://linux.cn/space/校对者ID
+
+[1]:ftp://ftp.kernel.org/pub/linux/kernel/people/sct/ext3/
+[2]:http://oss.sgi.com/projects/xfs/
+[3]:http://btrfs.wiki.kernel.org/
+[4]:https://ext4.wiki.kernel.org/index.php/Main_Page

sources/How To Hide Ubuntu 13.04 Unity Launcher In 5 Easy Steps.md

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+How To Hide Ubuntu 13.04 Unity Launcher In 5 Easy Steps
+================================================================================
+For last couple of days, I was exploring and learning about conky. While capturing its screen-shots, I got stuck with a repetitive task of cropping out unity launcher from the screen-shots. Suddenly, I asked myself — is there a way through which the unity launcher can be made hidden by default (i.e., it appears only when needed)? I googled around and found that it can be easily done through an option system settings. So, today, I’ll not be discussing a particular application but a useful how-to that will definitely be very helpful to other Ubuntu users.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-main.png)
+
+*Snapshot Of My Ubuntu Desktop With Unity Launcher*
+
+**NOTE** — All the instructions presented in this article are tested on Ubuntu 13.04
+
+## Steps To Hide Unity Launcher In Ubuntu 13.04 ##
+
+Here are the steps :
+
+**Step-1**
+
+Go to the main menu and click the **System Settings** option.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-1.png)
+
+**Step-2**
+
+Inside system settings, click the **Appearance** option.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-2.png)
+
+**Step-3**
+
+Now, go to the tab titled ‘Behavior’.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-3.png)
+
+**Step-4**
+
+Turn the radio button on the top right side from OFF to ON.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-5.png)
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-4.png)
+
+**Step-5**
+
+After previous step, the unity launcher gets hidden by default. It only appears when mouse hits the left end of the screen. To adjust the sensitivity of launcher appearance, slide the bar (shown below) as per your requirement.
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-5-1.png)
+
+Here is a snap-shot of my desktop when I completed all the 5 steps (listed above).
+
+![](http://mylinuxbook.com/wp-content/uploads/2013/09/unity-launcher-7.png)
+
+*Snapshot Of My Ubuntu Desktop With Unity Launcher*
+
+**Important**
+
+I also thought to reposition the unity launcher at the bottom of the desktop (like you have it in Apple’s Mac), but read that it is not possible to reposition the launcher in Ubuntu from 12.04 onwards. Just like many other users, I was also a bit disappointed. Anyway, if you want to read more on this, you can read this [detailed discussion on Ubuntu Forums][1].
+
+Share with us if you have known any unofficial way (an app or a plugin??) to reposition the unity launcher in Ubuntu 13.04.
+
+--------------------------------------------------------------------------------
+via: http://mylinuxbook.com/hide-unity-launcher-ubuntu-13-04/
+
+本文由 [LCTT][] 原创翻译，[Linux中国][] 荣誉推出
+
+译者：[译者ID][] 校对：[校对者ID][]
+
+[LCTT]:https://github.com/LCTT/TranslateProject
+[Linux中国]:http://linux.cn/portal.php
+[译者ID]:http://linux.cn/space/译者ID
+[校对者ID]:http://linux.cn/space/校对者ID
+
+[1]:http://ubuntuforums.org/showthread.php?t=2147537