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  The tips of learning Linux kernel

  As the Linux kernel has become one of the most gigantic and complex software project in the world, its complication scare many novices away. In this post, I will give some personal experience on how to learn Linux kernel, and hope these tips can offer some help to newcomers. (1) Download vanilla kernel and install it. Yes, I suggest you can find a physical machine, or if you really don’t have one at hand, virtual machine is also OK. Download the newest vanilla k...

       2017-07-28 22:53:11

  10 tools to make your shell script more powerful

Many people mistakenly think that shell scripts can only be run in command line. In fact shell can also call some GUI components such as menus,alert dialogs, progress bar etc. You can control the final output, cursor position and various output effects. Here we introduce some tools which can help you create powerful, interactive and user friendly Unix/Linux shell scripts. 1. notify-send This command can let you inform the process to send a desktop notification to users. This can be used to send ...

   shell,GUI,zenity     2013-04-05 08:50:41

  How to Asynchronously Upload Files Using HTML5 and Ajax

In my previous posts, we discovered How to Use HTML5 File Drag & Drop, and Open Files Using HTML5 and JavaScript. Now we have a valid set of files, it possible to upload each one to the server. The process occurs asynchronously in the background so the user can complete other on-page tasks while it occurs.The HTMLLet’s examine our HTML form again:view plainprint?<form id="upload" action="upload.php" method="POST" enctype="multipart/form-data"> ...

   HTML5,File upload,AJAX,Asynchronously,X-FILENAME     2011-10-29 13:45:00

  Microsoft wakes up to Open Source … in a big way!

Contrary to popular belief, Microsoft loves open-source. No, really! Don’t believe me? Read on: Today, Microsoft announced that it is open-sourcing all of its flagship web/cloud platform: ASP.NET MVC Web Pages (aka Razor), Web API. Importantly … these projects will be publicly hosted and that the team will continue development in the open (you’ll be able to view the repository and see the code commits as they happen) and that Microsoft will even cons...

   Oepn source,Microsoft,Ruby     2012-04-01 04:23:42

  Why does Symbian collapse?

On 24th January, Nokia announces a disappointing news that they would give up Symbian. The 808 PureView released last year will be its last Symbian model.  Symbian was born in 1998, it was supported by the then three mobile giants : Sony Ericson, Motorola and Nokia after its birth, later Samsung and LG also joined the Symbian camp. In 2000, the first Symbian model in the world Ericoson R380 was released, in 20006, there were over 100 million Symbian handphones on the market. But in 2007, t...

   Nokia, Symbian, Collapse, Analysis     2013-01-28 03:06:09

  Why accessing Java HashMap may cause infinite loop in concurrent environment

HashMap in Java is frequently used to handle key/value pairs. But it is not a good candidate to be used in concurrent environment where ConcurrentHashMap should be used instead. If used in concurrent environment, it may cause lots of unexpected behavior even including make the program getting into an infinite loop situation. To understand how this can happen, let's first discuss how HaspMap works internally. In this post we will use implementation of HashMap before Java 8 as example, Java 8 prov...

   JAVA,HASHMAP,INFINITE LOOP     2020-03-29 01:47:00

  Android IDE gets Pie-Friendly Update

An integrated development environment (IDE) provides facilities to computer programmers for software development. It consists of a source code editor, builds automation tools, and a debugger. The aim of the IDE is to reduce the configuration necessary to piece together multiple development utilities.The android application development process has become easier with the advancement of the new technologies. There are many considerations that are taken into account before developing an application....

       2018-09-26 07:41:56

  SSH Security and You - /bin/false is *not* security

Backstory While at RIT around 2004 or 2005, I discovered that a few important machines at the datacenter allowed all students, faculty, and staff to authenticate against them via ssh. Everyone's shells appear to be set to /bin/false (or some derivative) on said machines, so the only thing you'll see after you authenticate is the login banner and your connection will close. I thought to myself, "Fine, no shell for me. I wonder if port forwarding works?" ...

   Linux,Security,/bin/false,SSH     2012-02-06 07:46:29

  A Programmer’s Greatest Enemy

A programmer’s greatest enemy is getting stuck. A crucial skill in programming—and one that many of my beginning game programming students lack—is the ability to recognize when they’re stuck, to get out of being stuck, and to avoid getting stuck in the first place.Indeed, it’s a skill I’m still learning myself, although the contexts in which I still get stuck are shrinking with time, study, and experience.This morning, as I downloaded crash reports ...

   Programming,Enemy,Stuck,Game design,Crash     2011-10-15 15:06:46

  Becoming a Better Developer Part 3: Enjoy the Panorama

If you're trying to grow your startup you've come to the right place. Get my 170-page ebook on how to grow a startup and join thousands of self-funded entrepreneurs by subscribing to my newsletter at right. I’m writing this while sitting on a beach chair overlooking the Gulf of Guinea near Cape Coast in Ghana, West Africa. Although it’s slightly overcast the view is amazing, with whitewater stretching out in both directions as far as my laser-corrected eyes can see. Bein...

   Developer,Tips     2011-06-29 08:41:33