Interactive Voice Response system - FreeSwitch Installation

What is IVRS ?

A technology that allows a computer to interact with human through the use of voice and DTMF tones input via keypad.
IVR systems can respond with pre-recorded or dynamically generated audio to further direct user on how to proceed.How to Setup an IVR System.

If a=2 then a++ + ++a == 42. How?

Any C programming exam having objective questions, be it class test or campus placement exam, I am sure you must have faced these type of question more than once.
Yes....I know.... I can understand....

Bash ShellShock : Worst than Heartbleed

image - http://gizmodo.com

Bash Shellshock, the newly discovered vulnerability that allows attackers to inject code into your machine, puts your Mac or Linux at a serious risk for malicious attacks. It's kind of like Heartbleed, the Open/SSL bug that scared everyone senseless a few months ago and remains unpatched on thousands of systems. According to some experts, however, Shellshock could be way worse, and it's been around for decades.

How to check if you are vulnerable:

Calculate Log Base 2

Enter the base to which you want to calculate the log.

P vs NP for Newbies.

So you must have heard of P vs NP a lot if you are a computer science student, And if you failed to understand it so far like I was till now, here is the explanation in it-can-not-made-more-simpler words


Assuming You had played Super Mario...

You know how sometimes you can get stuck on a stage in Mario, and you spend hours and hours and hours trying to get to the end of the stage, but you just can't seem to figure it out?

How do you Identify a fake Facebook profile.

According to a report there are approx 83 million fake facebook profiles on the site. No no...it's not me who come up with this figure.  As I said 'a report' says that.

And over 45 million accounts are duplicate, means who forgot their credentials and created another account.

Play a song as soon as someone comes online

Today we are going to create a very simple and small script which plays a song when someone starts their system i.e. as soon as they come online (Of-course you both should be in same network. i.e their system should be reachable form yours) .

So have you heard of ping command. Yes? Great. We will use this command only.