How to use Oracle VM Virtual Box

Here the snapshots of using a Oracle VM Virtual Box for installing Red hat linux(or any other Os) in sequence order are there. please save this image and follow the steps.Now Installation of Red hat Linux

How to Share your Tweets in your Facebook wall

Now a days Twitter and Facebook are the viral social media. We used to share things with our friends and followers, most people update same thing in both Twitter and Facebook. Today i am going to guide you to how to Share your tweets in your facebook wall. Few months before there is an application to integrate tweets in Facebook wall but now Twitter included the Feature in Twitter Web UI itself. Its simple and Easy to Setup your Tweets to share on your Facebook wall.

Step 1:

First Login to the Facebook and Twitter. Then go to Twitter ‘Settings‘.

Step 2:

Click the ‘Profile’ Tab in the settings and you can find the Facebook feature at last.

Step 3:

Click ‘POST YOUR TWEETS TO FACEBOOK‘ button and it will ask your permission to connect the Facebook twitter app with your profile. Just Click “ALLOW

Step 4:

Now its all done, Your Twitter is configured to share the tweets in Facebook.Now Click ‘SAVE‘ and Post a Tweet and go to Facebook and check it will show your Tweet on your Facebook wall. (example screen shot below)Hope you learned how to Share your tweets on your Facebook wall. Why waiting, just connect your Twitter with Facebook and share your Tweets in your Facebook Wall.

How to Convert DVD to ISO Format file in few clicks

If you are thinking about how to backup your favorite DVD onto hard drive, or have kept looking for a good program to solve this but not found one, do not miss BDlot DVD ISO Master, then! I tried different similar DVD backup software, but none could impress me like BDlot DVD ISO Master.

BDlot DVD ISO Master is a freeware of two functions: convert DVD to ISO and Write ISO to physical DVD. I gave a try on it to save one of my DVD to ISO file. It ran smooth and fast, no error occurred like that I encountered on other software. If you want to back up your own DVD using this freeware, you just need to follow the simple steps:

 

  1. Download BDlot DVD ISO Master and install on your computer.
  2. Insert the DVD you want to backup into your Hard drive, and run the BDlot DVD ISO Master software.
  3. Choose the destination of output ISO file by clicking “Save as” on the top of the interface; DVD protections allows you to check and remove.
  4. Hit the “Run” button to start the converting process.
  5. Wait till the conversion to be finished.BDlot DVD ISO Master has simple but clean interface. It’s easy to use and operate. According to the official website www.bdlot.com, this freeware has nice features:
    1. Support all types of DVD discs including DVD-ROM, DVD-RAM, DVD+/-R, DVD+/-RW, and DVD+/-DL.
    2. Able to removing DVD all known restrictions such as Region Code, CSS, CPRM, CPPM, APS, UOPs, ARccOS, Rip-Guard, and Disney X protection.
    3. Keep original DVD video and audio quality in the output ISO file.
    4. Burn any ISO file to DVD disc and maintain normal and integrative date in the meantime.
    5. Compatible with all Windows operating systems.

A Virus Program to Disable USB Ports

In this post I will show how to create a simple virus that disables/blocks the USB ports on the computer (PC). As usual I use my favorite C programming language to create this virus. Anyone with a basic knowledge of C language should be able to understand the working of this virus program.

Once this virus is executed it will immediately disable all the USB ports on the computer. As a result the you’ll will not be able to use your pen drive or any other USB peripheral on the computer. The source code for this virus is available for download. You can test this virus on your own computer without any worries since I have also given a program to re-enable all the USB ports.

1. Download the USB_Block.rar file on to your computer.

2. It contains the following 2 files.

  • block_usb.c (source code)
  • unblock_usb.c (source code)

3. You need to compile them before you can run it.

3. Upon compilation of block_usb.c you get block_usb.exe which is a simple virus that will block (disable) all the USB ports on the computer upon execution (double click).

4. To test this virus, just run the block_usb.exe file and insert a USB pen drive (thumb drive). Now you can see that your pen drive will never get detected. To re-enable the USB ports just run the unblock_usb.exe  (you need to compile unblock_usb.c) file. Now insert the pen drive and it should get detected.

5. You can also change the icon of this file to make it look like a legitimate program.

What is CAPTCHA and How it Works?

CAPTCHA or Captcha (pronounced as cap-ch-uh) which stands for “Completely Automated Public Turing test to tell Computers and Humans Apart” is a type of challenge-response test to ensure that the response is only generated by humans and not by a computer. In simple words, CAPTCHA is the word verification test that you will come across the end of a sign-up form while signing up for Gmail or Yahoo account. The following image shows the typical samples of CAPTCHA.Almost every Internet user will have an experience of CAPTCHA in their daily Internet usage, but only a few are aware of what it is and why they are used. So in this post you will find a detailed information on how CAPTCHA works and why they are used.

What Purpose does CAPTCHA Exactly Serve?

CAPTCPA is mainly used to prevent automated software (bots) from performing actions on behalf of actual humans. For example while signing up for a new email account, you will come across a CAPTCHA at the end of the sign-up form so as to ensure that the form is filled out only by a legitimate human and not by any of the automated software or a computer bot. The main goal of CAPTCHA is to put forth a test which is simple and straight forward for any human to answer but for a computer, it is almost impossible to solve.

What is the Need to Create a Test that Can Tell Computers and Humans Apart?

For many the CAPTCHA may seem to be silly and annoying, but in fact it has the ability to protect systems from malicious attacks where people try to game the system. Attackers can make use of automated softwares to generate a huge quantity of requests thereby causing a high load on the target server which would degrade the quality of service of a given system, whether due to abuse or resource expenditure. This can affect millions of legitimate users and their requests. CAPTCHAs can be deployed to protect systems that are vulnerable to email spam, such as the services from Gmail, Yahoo and Hotmail.

Who Uses CAPTCHA?

CAPTCHAs are mainly used by websites that offer services like online polls and registration forms. For example, Web-based email services like Gmail, Yahoo and Hotmail offer free email accounts for their users. However upon each sign-up process, CAPTCHAs are used to prevent spammers from using a bot to generate hundreds of spam mail accounts.

Designing a CAPTCHA System

CAPTCHAs are designed on the fact that computers lack the ability that human beings have when it comes to processing visual data. It is more easily possible for humans to look at an image and pick out the patterns than a computer. This is because computers lack the real intelligence that humans have by default. CAPTCHAs are implemented by presenting users with an image which contains distorted or randomly stretched characters which only humans should be able to identify. Sometimes characters are striked out or presented with a noisy background to make it even more harder for computers to figure out the patterns.

Most, but not all, CAPTCHAs rely on a visual test. Some Websites implement a totally different CAPTCHA system to tell humans and computers apart. For example, a user is presented with 4 images in which 3 contains picture of animals and one contain a flower. The user is asked to select only those images which contain animals in them. This Turing test can easily be solved by any human, but almost impossible for a computer.

Breaking the CAPTCHA

The challenge in breaking the CAPTCHA lies in real hard task of teaching a computer how to process information in a way similar to how humans think. Algorithms with artificial intelligence (AI) will have to be designed in order to make the computer think like humans when it comes to recognizing the patterns in images. However there is no universal algorithm that could pass through and break any CAPTCHA system and hence each CAPTCHA algorithm must have to be tackled individually. It might not work 100 percent of the time, but it can work often enough to be worthwhile to spammers.

Get Your Old Facebook Chat back

Facebook, the biggest social network site updated many features like video call and now it changed its chat features as Sidebar chat, but its really annoying the users. We can’t see who are online, it will just show our few friends who are we interact most, it will be most irritating one for who have more number of friends. Its really simple script you have to install in your Browser to get your Old Facebook chat. Lets see how to get back our Favorite Facebook chat.

How to Install Old Facebook Chat Script in Mozilla Firefox

In Mozilla Firefox, First we need to install Grease Monkey Add-on before installing the Old Facebook Script. So Open the Firefox and go to Download page of the Grease Moneky Add-on from the following link. Click here to go to Gease Monkey Add-on Download page. In the Download page Click ‘Add To Firefox’ button.After clicking ADD TO FIREFOX button, the popup will ask about installation. Click INSTALL and Its done.

Now Gease Monkey Add-on is Installed. Now Click here to go to Script Page in the Script Page click Install button which is in the Right top, same as we did above for How to get Old Facebook chat for Google Chrome.

After installing Close the Facebook and Open it again to see the Old Facebook chat is available. if you can’t find, Clear the cache files and try again. Anytime you can remove this script from Gease Monkey add-on to get the New sidebar chat box.

How to Install Old Facebook Chat Script in Google Chrome

In Google Chrome, its really easy task to install the script to enable the Old facebook chat. Just Click the Following link to install Script. CLICK HERE TO GO TO DOWNLOAD SCRIPT PAGE. In the Script page Click ‘INSTALL’ button which is in the Top Right side of the page.Now the Install Popup will appear, in that box CLICK ‘INSTALL’ and now the Script is Installed.Now the Script is Installed. Now Close the Existing Facebook page and Open the Facebook again. You can See your Old Favorite Chat is available. If you cant see the old facebook chat, Clear the cache and open the facebook. Anytime you can remove this script from extension menu of the Google chrome to get the New sidebar chat box.