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  New features in Java 9


Java 9 is planned to be released in March 2017. It will be 3 years since Java 8 was released. Are you still excited about the new features introduced in Java 8 such as Lambda, new Date APIs etc? Now Java 9 is to be released and there are also quite a few fantastic new features to be introduced. Below is a list of major new features in Java 9. Modular system. Java 9 will introduce a brand new modular system to organize Java codes. The modular system will divide different packages into diffe...

   JAVA,NEW FEATURE,JAVA 9     2016-04-05 09:56:01


  The Reality


Everyone loves to talk about benchmarks. AMD’s Andy Parma recently wrote a blog that covers the top performance scores for the AMD Opteron™ 6200 Series processors. As marketing professionals, of course that’s what we talk about. What’s important to look at is the reality as well – what customers are actually purchasing. When you drive past car dealership, you’ll always see the fancy red sports car prominently displayed. It draws people in – it’s what the car dealers pur...

   AMD,Intel,Comparison,AMD vs Intel processor,artitecture     2011-11-15 08:33:58


  The ‘Edge’ in Developing for Android Devices


In today’s times, the consumer is spoiled for choice with the number of options they have with respect to owning mobile device hardware and their operating systems. This diverse availability raises a critical question for both independent developers as well as large app development companies as to which platform to target. Although for larger app development companies, it is possible to simultaneously develop for multiple platforms, it might not be the case for small-scale enterprises. In...

   Android App Development Company, Web Application Development Company, Android App Developers, Web De     2015-08-07 05:36:11


  Use DTrace to diagnose gdb issues


A few days ago, I installed the newest 64-bit gdb program (version 7.7.1) on Solaris 10 (X86_64 platform) to debug programs. After playing with the gdb a day, I found 2 issues about gdb:(1) The "set follow-fork-mode child" command doesn't take effect. By default, after the parent process forks the child process, the gdb will track the parent process, so this command can make gdb begin to follow the child process. But this command works OK on Linux.(2) The gdb can't parse the 32-bit application c...

   DTrace, debug, gdb, UNIX     2014-06-28 05:11:20


  How to secure an Ubuntu Apache web server


Securing server software is not a straightforward task. Not all of our operating environments are the same, leading to a variety of potential security vulnerabilities. However, using a few basic configuration and security options, you can stay a little ahead of where you want to be. 1. Fail2ban Fail2ban is a Python-based intrusion prevention software that detects and blocks malicious IP addresses from multiple unsuccessful attempts at software logins. In other words, if someone is attempt...

   Unix server security,Log,.htaccess,Cache     2011-12-27 09:25:32


  Server monitoring shell scripts


There are many open source server monitoring software such as cacti and nagios. Besides these, can we write our own shell scripts to monitor them? The shell scripts written by ourselves can fulfill our special requirements better and have a more detailed coverage. Below are some commonly used shell scripts used by Evangelist, an Oracle DBA. 1. Check network gateway traffic #!/bin/bash #network #Mike.Xu while : ; do time='date +%m"-"%d" "%k":"%M' day='date +%m"-"%d' rx_before='...

   Server monitor,CPU,memory,shell     2013-08-30 21:56:14


  HeartBleed: Inside the heart, what causes the bleeding?


Just after a few weeks since Apple's famous goto fail bug, there is one bug in OpenSSL which catches the attention from the world again. The bug is named HeartBleed, found in OpenSSL library, a famous open source library supporting lots of  SSL/TLS communication among server/client applications. The reason why this bug catches the attentions from the world is it affects almost all sites which are using the affected OpenSSL library, these includes many applications like Nginx server, some v...

   OpenSSL,HeartBleed     2014-04-09 05:47:30


  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


  Set file permission in Java


Prior to Java 6,  there is no good solution at the Java level to provide file permission management. You need to implement your own native methods or call the Runtime.exec() to invoke the system routine such as chmod in LInux. Since Java 6, Java introduces a set of methods which can be used to set the file permission at Java level. These methods include: File.setReadable(boolean); File.setWritable(boolean); FIle.setExecutable(boolean); File.setReadable(boolean, boolean); File.setWritable(bo...

   JAVA, FILE PERMISSION, POSIX,learnjava     2015-08-29 03:37:37


  Why every programmer should learn Python or Ruby


If you are a student, you probably know C, C++ and Java. A few know VB, or C# / .NET. At some point you’ve probably built some web pages, so you know HTML, CSS and maybe JavaScript. By and large, it is difficult to find students who have any exposure to languages beyond this. And this is a shame because there are a number of programming languages out there which will make you a better programmer. In this article, we give some reasons why you must learn Python or Ruby2. Compared to C/C++/...

   Python,Ruby,Advantage,JavamCmDusadvantag     2011-07-25 08:41:42