Nexus

Java developers prefer JUnit, Jenkins, and Git

Read

Survey also reveals two-thirds of Java developers are still using Java 7, and Scala topped the list of alternative JVM languages.

Java developers prefer JUnit, Jenkins, and Git

When it comes to tools, Java developers prefer the JUnit testing framework, Jenkins continuous integration server, and Git version control system most of all, a survey of more than 2,000 Java professionals reveals.
"It probably comes as no surprise that among the 2,164 developers we surveyed, Java SE 7 is used by two-thirds of developers, but even more are using JUnit at 82.5 percent, making it the most-used single technology across the entire Java landscape," states the report by tools vendor ZeroTurnaround's RebelLabs business unit. Nearly two-thirds of the respondents were developers.

Other popular Java tools, according to the survey, are Jenkins (70 percent), Git (69 percent), the Hibernate object-relational mapping framework (67.5 percent), the Maven build tool (64 percent), and the Nexus repository (64 percent). The Eclipse IDE, used by 50 percent of respondents, was the most popular IDE, while the MySQL database (at 32 percent) was the top SQL technology. MongoDB (at 56 percent) was the leading NoSQL choice.

Just 7 percent of respondents were using Java SE 8, which was released in March, while 26 percent were still on Java 6. But usage of Java 6 had been 88 percent in 2012. And 35 percent cited Java 8 as a priority for 2014-15. Most respondents -- 68 percent -- also were using Java EE.

When it comes to new languages on the Java virtual machine, Scala topped the list of languages of most interest to respondents, at 47 percent. It was followed by Groovy (31 percent) and Clojure (12 percent). "Considering the professional support and community strength behind Scala by Typesafe, it's easy to see the Scala ecosystem continue making gains into enterprises as a serious alternative to Java," the report says.

As far as developers' priorities for this year and next, technologies such as devops and development in the cloud (both at 7 percent) trailed Java 8 considerably. Devops, the report says, "seems to be struggling to find a crisp and clear mission statement -- it is not always clear what is the key problem it is solving." The Internet of things was cited by only 5 percent of respondents.

At 50 percent, Apache Tomcat remains the dominant application server, followed by JBoss (16 percent), Jetty (12 percent), and GlassFish (7.4 percent).

This story, "Java developers prefer JUnit, Jenkins, and Git," was originally published by mithilesh joshi

Read More Add comment

Get Rid of Lp.greatappsfree.net Pop-ups Completely

By 0x000216

Read

0 Comments

Read More Add comment

#Howto verify #DDOS attack with #netstat command on #Linux Terminal

By 0x000216

Read

0 Comments

Your server appearing pretty slow could be many things from wrong configs, scripts and dodgy hardware – but sometimes it could be because someone is flooding your server with traffic known as DoS ( Denial of Service ) or DDoS ( Distributed Denial of Service ).

Denial-of-service attack (DoS attack) or Distributed Denial-of-service attack (DDoS attack) is an attempt to make a machine or network resource unavailable to its intended users. This attack generally target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers. DoS attacks are implemented by either forcing the targeted computer to reset, or consuming its resources so that it can no longer provide its services or obstructs the communication media between the users and the victim so that they can no longer communicate adequately.

In this small article you’ll see how to check if your server is under attack from the Linux Terminal with the netstat command

From the man page of netstat “netstat – Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships”

Some examples with explanation

netstat -na

This display all active Internet connections to the server and only established connections are included.

netstat -an | grep :80 | sort

Show only active Internet connections to the server on port 80, this is the http port and so it’s useful if you have a web server, and sort the results. Useful in detecting a single flood by allowing you to recognize many connections coming from one IP.

netstat -n -p|grep SYN_REC | wc -l

This command is useful to find out how many active SYNC_REC are occurring on the server. The number should be pretty low, preferably less than 5. On DoS attack incidents or mail bombs, the number can jump to pretty high. However, the value always depends on system, so a high value may be average on another server.

netstat -n -p | grep SYN_REC | sort -u

List out the all IP addresses involved instead of just count.

netstat -n -p | grep SYN_REC | awk '{print $5}' | awk -F: '{print $1}'

List all the unique IP addresses of the node that are sending SYN_REC connection status.

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

Use netstat command to calculate and count the number of connections each IP address makes to the server.

netstat -anp |grep 'tcp|udp' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

List count of number of connections the IPs are connected to the server using TCP or UDP protocol.

netstat -ntu | grep ESTAB | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr

Check on ESTABLISHED connections instead of all connections, and displays the connections count for each IP.

netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1

Show and list IP address and its connection count that connect to port 80 on the server. Port 80 is used mainly by HTTP web page request.

How to mitigate a DOS attack

Once that you have found the IP that are attacking your server you can use the following commands to block their connection to your server:

iptables -A INPUT 1 -s $IPADRESS -j DROP/REJECT

Please note that you have to replace $IPADRESS with the IP numbers that you have found with netstat.
After firing the above command, KILL all httpd connections to clean your system and than restart httpd service by
using the following commands:

killall -KILL httpd
 
service httpd start           #For Red Hat systems 
/etc/init/d/apache2 restart   #For Debian systems

Read More Add comment

Remove/ Get Rid of Sslredirservice.com Pop-ups and Fix Chaos

By 0x000216

Read

0 Comments

Read More Add comment

Dual-boot #Windows 7 and #KaliLinux

By 0x000216

Read

0 Comments

This article is a step-by-step guide on how to dual-boot Windows 7 and Kali Linux on a single hard disk drive (HDD). Kali Linux is what used to be BackTrack Linux, a distribution designed for penetration testing and security professionals. It ships with about 300 penetration testing and hacking applications installed.

While BackTrack is based on Ubuntu, Kali Linux is based on Debian, and uses the complete Debian Installer. As a result, the installation process is different from that of BackTrack, which uses Ubuntu’s graphical installation program.

The objective here is to show how to install it on an HDD alongside an existing installation of Windows 7, with the Windows 7 boot manager as the “master” boot loader, so that at the end, when the computer is (re)booted, you will be presented with a boot menu that looks just like the one shown below. Selecting Windows 7 boots the system into Windows 7 and choosing Kali Linux will, by default, take you to the Kali Linux boot menu, which is the same thing as the GRUB 2 menu, the version of GRUB used by Kali Linux.

To bypass Kali Linux’s boot menu, simply edit the file named /etc/default/grub and change GRUB_TIMEOUT=5 toGRUB_TIMEOUT=0. Then run the update-grub command.

Now that we know what to do, and what the result will be, let’s get it done. If you have not done so already, download an installation image of Kali Linux from here.

1. Shrink the Windows 7 C Drive: My test system has an existing installation of Windows 7 on a 500 GB HDD, with just two primary partitions. This is how they appear in Windows 7′s partition manager. The task here is to shrink the C drive to create room for installing Kali Linux. To do that, right-click on the C drive and select Shrink Volume.

Note: If you intend to install Windows 7 afresh, this process will be a lot easier if you set aside the free space that will be used for Kali Linux during the installation of Windows 7. Windows 7 Partitions

If you have enough free space on the C drive, the system will suggest a 50-50 split of the free space. Which is just good enough for this test installation. Shrink. Windows 7 Shrink Partitions

After the operation has completed, you should see the newly reclaimed space next to the C drive. You may exit the partition manager and reboot the computer. Be sure to have the installation disc of Kali Linux in the optical drive before rebooting. Windows 7 Partitions

2. Install Kali Linux: The best option to select on Kali Linux’s boot menu is Graphical Install. It gives you a point-and-click installation process. Install works just as well, but the interface is ncurses-based. Kali Linux Boot Menu

For installing Kali Linux, the following partitions will be created: /boot, /, /home, and Swap. In that order. The /home partition is optional. At the disk partitioning methods step of the installation process, you get a bunch of options. Because none of the guided options will create a separate /boot partition, creating the partitions will have to be done manually. So select “Manual” and click Continue. Kali Linux Debian Installer

Here you can see the existing Windows 7 partitions, both of which are primary partitions. The free space, reclaimed from Windows 7 in the previous step is what will be used for creating the partitions for Kali Linux. To start creating the partitions, select the free space and click Continue. Kali Linux Create Partition

Create a new partition. Continue. Dual-boot Windows 7 and Kali Linux

This shows the total amount of disk space available for Kali Linux. The /boot partition will be created first, so you need to specify the amount of disk space for it. Kali Linux Create Partition size

For this test system, I assigned 300 MB to it. Continue. Dual-boot Windows 7 and Kali Linux

Because you still have two primary partitions to use, you can create the boot partition as a primary or logical partition. Either option will work, but the installer prefers creating it as a primary partition, if the boot loader is going to be installed in it. For this test installation, I chose to create it as a logical partition. Continue. Dual-boot Windows 7 and Kali Linux

Beginning. Continue. Kali Linux Create Partition size

This step shows the details of the boot partition you just created. The only thing you need to change here is the mount point. Double-clicking on it will open another window where you can specify the correct mount point. Dual-boot Windows 7 and Kali Linux

Here’s what it should look like after the mount point has been specified. The other option you might want to change here is the Bootable flag. Kali Linux

There is a good reason it should be enabled, but the system will boot even if it is disabled. It just depends on your BIOS version. For this test installation, it was disabled and the system still worked perfectly. Dual-boot Windows 7 and Kali Linux

Here’s the final details of the boot partition. Scroll to “Done setting up the partition,” then click Continue. Note that the steps you used to create the boot partition will be repeated for the other partitions. Kali Linux

Back to the main disk partitioning window, you can see the boot partition you just created, plus the remaining free space. Select, the free space, then click Continue. Kali Linux

source

Read More Add comment

Trik Tips Dan Cara Aman Factory Reset di Android

By 0x000216

Read

0 Comments

Read More Add comment

WPF Elements and Controls: Basic Concepts and Questions

By 0x000216

Read

0 Comments

WPF Elements and Controls: Basic Concepts and Questions

In this article, I have covered very basic concepts of WPF Elements and Controls in the form of questions and answers like the difference between elements, controls, content controls, headered content controls and layout containers, difference between tooltip and popup, difference between radiobutton and checkboxes, lexicon file etc. Last question illustrates the difference between resource files and content files in WPF (this question is out of the blog post title as these files are not WPF elements).

1. What is the difference between WPF Elements and WPF Controls?

There is a difference between WPF Elements and WPF Controls. All the WPF Controls are WPF Elements but vice-versa is not true. Any WPF element which can receive focus and accepts inputs from keyboard or mouse is called WPF Control.

For example: Textbox, Button are WPF Controls.

Exceptions: Tooltip and Label are also considered as WPF Controls because Tooltip appears and disappears depending on user's mouse movement. Similarly, Labels support mnemonics (shortcut keys), that's why Labels are also considered as WPF Controls.

Note: All the WPF Controls are derived from System.Windows.Control class.

2. What is the difference between WPF Controls and WPF Content Controls?

A WPF Content Control is the Control that can hold and display a piece of content.

For example: Button, RadioButton, CheckBox, Label, Tooltip, ScrollViewer, UserControl, Window etc.

Note: All the WPF Content Controls are derived from System.Windows.ContentControl Class.

3. What is the different between WPF Content Controls and Headered Content Controls?

Headered Content Controls are the Content Controls which have both content region and header region which can be used to display some sore of title.

For example: GroupBox, TabItem and Expander

Note: All the WPF Headered Content Controls are derived from HeaderedContentControl class.

4. What is the difference between WPF Content Controls and WPF Layout Containers?

WPF Content Controls can contain only a single nested element while layout containers can contain as many nested elements. You can also take a lot of elements in Content Controls but the condition is that all the elements should be wrapped in a single parent layout container like stackpanel or grid.

5. What is the difference between Label and Textblock in WPF?

Label and Textblock are used to display the content on the screen. The basic difference is that Label support mnemonics (shortcut keys) while Textblock does not. If you do not want shortcut features, you can simply use Textblock as it is lightweight and also supports text wrapping which label does not.

6. What is the different between RadioButton and CheckBox in WPF?

You can do grouping in RadioButton but not in CheckBoxes.

For example: If you place 3 radio buttons in a stack panel, all the radio buttons in that stack panel are grouped i,e you can select any one of them but that feature is not there in CheckBoxes.

Note: Button, RadioButton and CheckBox are derived from ButtonBase class. Further, RadioButton and CheckBox are derived from ToggleButton class.

7. What is the different between Tooltip and Popup in WPF?

There are many differences between WPF Tooltip and Popup:

A) You cannot put user interactive controls in Tooltip as it cannot accept focus but same is possible in Popup.

B) Tooltip is opened and closed automatically when mouse is hovered but Popup does not.

8. How will you get the list of all the fonts installed on your system in WPF?

I will use static SystemFontFamilies collection defined in the System.Windows.Media.Fonts class.

foreach (FontFamily fontFamily in Fonts.SystemFontFamilies)

{

lstFonts.Items.Add(fontFamily.Source);

}

9. What is the lexicon file in WPF? What is its use?

Lexicon file with exetension .lex is used to create customize the dictionary which is used for spell checking feature in WPF. In your WPF application, when you enable spell checking feature, WPF uses its default dictionary to recognize the words. If you want to add some extra words to that dictionary, you will have to create a lexicon file and add your words there. WPF supports dictionaries in English, German, Spanish and French.

10. What is the difference between Resource Files and Content Files in WPF?

1. Resource files are embedded into the assembly (exe or dll) while content files do not embed with assembly.

2. Content files are used instead of resource files in following scenarios:

A) You want to change the resource file without recompiling the application.
B) The resource file is very large.
C) The resource file is optional and may not be deployed with the assembly.
B) The resource file is a sound file.

How to make a resource file? Just add a file (say any image file) and set its Build Action to Resource (which is by default) in Properties Window.

How to make a content file? Just add a file (say any image file) and set its Build Action to Content in Properties Window. Set Copy to Output Directory to Copy Always.

For example: Suppose you have added a .jpg file of 30KB to your application as a resource. After you Build your application, you will notice an increase of approximately 30KB size in your exe. But if you use same file as content, there will be no increase in the size of exe, but you will notice that same file will be copied in the exe directory.

Related articles: I have written two posts on commonly asked WPF questions and answers. If you are looking for something like that, you can visit Part 1 and Part 2.

Read More Add comment

#OpenSSL Man In The Middle Flaw Found After 16 Years

By 0x000216

Read

0 Comments

A 16-year-old flaw in OpenSSL has been uncovered, just two months after the Heartbleed saga came to light.

An advisory notice on the OpenSSL website reports that a man-in-the-middle vulnerability – referred to as CVE-2014-0224 – was uncovered by security researcher Masashi Kikuchi.

“An attacker using a carefully crafted handshake can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a man-in-the-middle (MITM) attack where the attacker can decrypt and modify traffic from the attacked client and server,” the advisory states.

It adds that the attack can only be performed if both the client and server are vulnerable, which will be the case if servers are running OpenSSL 1.0.1 or 1.0.2-beta1.

“Users of OpenSSL servers earlier than 1.0.1 are advised to upgrade as a precaution,” the notice says.

Kikuchi helped to produce a fix for the problem that was finalised by Stephen Henson of the OpenSSL core team and is available to download and install from here.

Kikuchi provided more information on how he uncovered the bug on a blog post, revealing that the issue had never been found before due to insufficient code checks.

“The biggest reason why the bug hasn’t been found for over 16 years is that code reviews were insufficient, especially from experts who had experiences with TLS/SSL implementation," he wrote.

“If the reviewers had enough experiences, they should have verified OpenSSL code in the same way they do their own code and they could have detected the problem.”

Nicholas Percoco, vice president of strategic services at security firm Rapid7, said that given most servers had been upgraded to the most recent version after Heartbleed, millions could be affected by this latest threat.

"The newly disclosed man-in-the-middle vulnerability disclosed in OpenSSL affects all client applications and devices that run OpenSSL when communicating to vulnerable servers of specific versions, but includes the most recent.

"This likely contains the majority of systems on the internet given most rushed to upgrade OpenSSL after the Heartbleed disclosure in early April of this year.”

The latest security woes around OpenSSL show that the two new staff being sought by The Linux Foundation to work on the technology will have plenty to keep them occupied.

Nexus

Java developers prefer JUnit, Jenkins, and Git

Survey also reveals two-thirds of Java developers are still using Java 7, and Scala topped the list of alternative JVM languages.

Get Rid of Lp.greatappsfree.net Pop-ups Completely

#Howto verify #DDOS attack with #netstat command on #Linux Terminal

How to mitigate a DOS attack

Remove/ Get Rid of Sslredirservice.com Pop-ups and Fix Chaos

Dual-boot #Windows 7 and #KaliLinux

Trik Tips Dan Cara Aman Factory Reset di Android

WPF Elements and Controls: Basic Concepts and Questions

#OpenSSL Man In The Middle Flaw Found After 16 Years

Get Rid of Cts.AdsSend.net Pop-ups and Fix Chaos

Recent Posts

Facebook