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  Unix directory hierarchy history

As a beginner user of Unix or Linux, people would frequently get confused about the use of different directories of the system.  For example, there is a /bin directory under root(/), it is used to store binary files. However, there are /usr/bin and /usr/local/bin under /usr which are used for storing binary files as well. Some systems even have /opt/bin. What are the differences among them? Though there are articles explaining different directories in *nix such as Filesystem Hierarchy Stan...

   UNIX,LINUX,FILESSYTEM,DIRECTORY HIERARCHY,HISTORY     2016-10-21 23:47:17

  Disposable Email address

There is one statement which says Giving out your email address is like starting a relationship. What happens when you want to break up?Once you gave out your email address, you may take the risk of receiving big amount of junk emails. However, when we register on some websites, we must provide our Email address to receive authentication emails. If we cannot receive the authentication email, we cannot finish the registration process. Is there any alternative way?We can use disposable email, i.e,...

   Disposable email,Website,Summary     2012-05-19 12:27:14

  iPhone 5 vs Samsung Galaxy S3 drop test

With the launch of the iPhone 5, there are quite a few companies starting the test of Apple's new darling. Recently, Android Authority released a video of a test. The test is about ropping iPhone 5 and Galaxy S3 three times from different heights, the result is not good to Galaxy S3, although two phones can still work, the Galaxy S3 screen almost completely torn.In daily life, we may pull out the phone from our pocket and hold it in our hand, put the phone to our ear. In these three cases, the p...

   iPhone 5,Galaxy S3,drop test     2012-09-21 23:42:18

  Google may integrate Chrome OS and Android to build Google OS

A few days ago Google announced Andy Rubin would not in charge of Android anymore and Sundar Pichai would take over Andy Rubin's position. This triggers many guesses on the future direction of the Chrome OS and Android operating system.According to Digitimes, Google is likely to integrate the Chrome OS and Android to build an unified Google OS. But to challenge Windows in the global notebook market, this new system may be in a difficult time in next 1 or 2 years.Google and Acer have indicated b...

   Google OS,Sundar Pichai     2013-03-16 23:55:24

  The header element in HTML 5

Currently HTML5 is exciting and anyone who want to builds web pages is looking forward to implementing HTML5 new tags into their sites. Definitely HTML5 tags are very rich in functions that make life much easier for both webmasters and end users Within the HTML5 specfication we can see that there have been a significant number of new tags added, one of these the <header> element is what we’ll be covering here. We will talk about when to use it, when not to use it. As we ar...

   HTML5,Header     2012-05-03 09:12:58

  Use rsync to delete mass files quickly in Linux

Yesterday I encountered an issue to delete many log files in my Linux workstation, there were around 100,000 files to be deleted. These are log files and they grow very fast, and we need to delete them frequently. Usually we would use rm -rf * to delete these files, but we may need to wait for a relative long time if there are too many files. So we must adopt some unusual way. Fortunately, we can use rsync to delete mass files in one shot. 1. Install rsync yum install rsync 2. Create a new empty...

   rsync,delete file, demo     2012-11-13 10:44:50

  try { return } finally {}

Do you know what value will be printed when following program is ran? class Test { public int aaa() { int x = 1; try { return ++x; } catch (Exception e) { } finally { ++x; } return x; } public static void main(String[] args) { Test t = new Test(); int y = t.aaa(); System.out.println(y); } } And before answering the above question, do you have answers to following questions? If ther...

   JAVA,JAVA INTERVIEW QUESTION     2016-09-26 08:06:28

  Why doesn't Microsoft involve in the patent war with Apple?

After Apple and Samsung patent war ends, Samsung immediately announced that they would continue to appeal. People are now guessing that the next target of Apple is Motorola and Google, while the situation getting worse, we could not help to ask why there is no emergence of Microsoft?At first glance, the answer seems to be very simple, both Microsoft Window 8 and Window Phone products do not have much intersection with Apple's products. But there is an unknown reason, there is a patent cross-lice...

   Microsoft,Apple,Patent     2012-08-27 22:10:19

  How to use Chome dev tool to find event handler bound to an element

As a front end developer, there is frequent need to debug JS code and sometimes need to find out what event handler has been bound to a HTML element. In this post, we will show how to find out the click event handler bound to a HTML element, this same applies to other events as well. Nowadays, a web application is usually very complicated and there are lots of JS codes which makes it difficult to find out what click event handler has been bound to a HTML element, especially when the JS source co...

   JAVASCRIPT,CHROME,CHROME DEV TOOL,EVENT LISTENER     2019-08-17 22:14:36

  Fab CEO: Why we choose Tencent in China?

Today one important news is that Fab completes its D round fund raising with 150 million US dollars. Regarding this round of fund raising, Fab CEO Jason Goldberg explained : "If Fab wants to do business in US only, then it's not necessary to raise so much money.". Also from the investment of Tencent and Itochu from Japan, China and Japan will be Fab's new market of expansion. Why does Fab choose to cooperate with Tencent to expand Chinese market?(There was news that Alibaba was also contacting F...

   Fab,Tencent,Alibaba     2013-06-19 03:05:03

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