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  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

  How deep should unit test go?

There is a question on Stackoverflow which says "How deep are your unit tests?". It is asked by a guy named John Nolan. The question is not too new, but what catches me is the Best Answer given by Kent Beck, who is the creator of Extreme programming(XP) and Test Driven Development(TDD). Let's look at the question first. The thing I've found about TDD is that its takes time to get your tests set up and being naturally lazy I always want to write as little code as possible. The first thing I seem ...

   Unit test,TDD,XP     2012-09-03 10:11:27

  How to let Google index AJAX contents?

There are lots of websites containing only one page now with the popularity of AJAX. The website will load different contents according to different inputs from users. This approach provides good user experience and it also helps save bandwidth, the drawback is that AJAX contents are not easy to be indexed by search engines. For example, if you have a website: http://example.com Users can see different contents with the appended # structure in the URL: http://example.com#1 http://example.com#2 h...

   AJAX,Search engine,Google,History     2013-07-16 00:47:14

  iPhone 5 first weekend sales over 5 million

Within 24 hours openning for pre-order, 2 million iPhone 5 have been ordered, Apple announces that  sales of iPhone 5 are over 5 million in 3 days on sale., in addition, iOS devices upgraded to iOS6 are around 100 million. Apple CEO Tim Cook says : Demand for iPhone 5 has been incredible and we are working hard to get an iPhone 5 into the hands of every customer who wants one as quickly as possible,While we have sold out of our initial supply, stores continue to receive iPhone 5 shipments ...

   iPhone5,,iOS6,sale,pre-order     2012-09-24 10:55:12

  Samijyon : A tablet from North Korea

According to Sina Tech, North Korea Tech posted an article about Samijyon. Samijyon is a model of Android  tablet manufactured by North Korea. You can buy it with $200 in North Korea. Smajiyon's hardware configuration is as good as Samsung and Apple, but it doesn't allow WiFi connection and ordinary North Koreans cannot connect to Internet as well, users can only connect to domestic network of North Korea. On this tablet, there are no built-in Google apps such as Gmail and Google Play. But...

   Samijyon,North Korea,Tablet     2013-08-03 22:01:35

  Facebook share price is over $38 before the market opens on Wednesday

According to Sina Tech, Facebook share price is over $38 before the market opens on Wednesday. It's the first time that its share price is over $38 since its IPO last year. In May 2012, Facebook went to public on Nasdaq with a releasing share price of $38. The share price went below $38 after the first trading day. Then after its share price kept dropping until last September it reached to its lowest point with a share price of $17.58. But as Facebook's performance was better than expected last...

   Facebook ,Share price     2013-07-31 07:45:18

  Can API be copyrighted? At least Oracle hopes so

  The result of the lawsuit case war between Oracle and Google is clearer now. The court said that 9 lines of code of Android has violated intellectual property right, these 9 lines of code can be ignored relative to the number of codes for the whole Android system. But just like LinuxToy points out that the reasons why this case catches so much attention are : 1). The amount of money Oracle asked from Google is $1 billion; 2). The statement says Java language itself doesn't violate the int...

   Oracle,Google,API,Copyright,Lawsuit case     2012-05-11 00:47:58

  There is no privacy in front of Facebook Home

Facebook CEO Mark Zuckerberg announced the release of Facebook Home application. It will be available for Android users on 12th April. But there is one thing to be noted. What's about our privacy? Facebook is questioned by public about its privacy issues. Facebook Home is deeply integrated with Android and has fully control of the entry of user. This makes people who care about privacy alert. The editor of Gigaom Malik expressed his own worries in one article. Here is what he wrote: The new Hom...

   Facebook Home,Privacy     2013-04-05 10:51:46

  Twitter is the winner of US election

Yesterday, the final result of the U.S. election was that Obama defeated Romney and he was re-election as President of the United States of America, Later he made a victory speech. While in the Internet world, the real winner is not Obama, but Twitter. Why? Because there was no downtime for Twitter yesterday.On election day, There were a total of 31 million election-related Tweets posted, In peak period, there were 327,452 tweets posted per minute,  the peak record was 874,560, about 15,107...

   Twitter, US election,Fail whale     2012-11-08 10:55:38

  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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