Programming is an essential thing in hacking/pentesting, and at times, I do not feel that it is being addressed enough here, at Null-byte. I understand that this is a forum dedicated for hacking, but I'll address some of the stuff I feel is muy importante about programming. I am not a professional programmer, but I do have experience and I do want to share some of the stuff professionals have taught me.
If you want to learn how to program in the Java language, then the first thing you're going to need to do is download and install the JDK. That stands for Java Development Kit, and is the basis for anyone begging in Java, and you need it to get the Javac (Java compiler) running. This video will show you what to do, and will show you how to set a new variable name and value in the Environment Variables under Advanced System Settings on your Windows PC.
Need help reducing fractions containing algebraic variables? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve an equation for a variable in algebra.
This video walks you through the steps on how to do variable expressions problem. This excellent video shows you a clean blackboard, with the instructors voice showing exactly what to do. Don't fret, any question you may have, will be answered. Watching this video will make you feel like your back in the classroom but rather comfortably from your home.
This is a helpful video provided by Math Problem Generator. It deals with the complex challenges of dividing variables. The audio is great and provides specific examples of dealing with multiple types of this problem. The video lays out three simple steps. The first being to simplify the coefficient, the second being to divide the variable, and the third being to deal with the results of the division. The information is clearly presented and best of all it's free. I think we all wish there we...
For some odd reason, the Netflix app likes to disable the Nexus Player's built-in screensaver. It doesn't use its own, it simply keeps your screen on indefinitely, which of course can lead to screen burn-in. This is not just an Android TV issue, as the Netflix app does the same thing on Roku and smart TVs.
Welcome back, my amateur hackers! Over the course of the next year, we will be developing our own zero-day exploits. In my first article in this series, I introduced you to buffer overflows, which are the source of some of the most lethal exploits, particularly the "remote code execution," so we are focusing our exploit development here on a buffer overflow.
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. For all of the details, watch this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, we learn how to calculate the variance of differences of random variables.
In this tutorial, we learn how to customize bash prompts with the PS1 variable. The PSI variable will say what something does. You can change this using the export command. Basically, you just type in the same thing and add in something. You can do this by simply typing it in using your keyboard. After this, press enter on your keyboard, then continue to change more things. There are a ton of different things you can do with this. You can find more from the website: http://pastebin.com/f2309f...
In order to simplify complex variables, you must first consider the numerical values separate from the variable. In the case of 24x/48x, you would look at the numbers alone to see if they have any factors. These numbers have the number 6 in common. So, divide it by 6. This will give you 4/8. This still requires some simplification. Two is still a factor for both. So, divide it again by four. This will give you 1/2. Now, if the numerator was raised to the second power, in the original equation...
Need help figuring out how to solve an equation with given variables in algebra? Learn how with this free video math lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).
Need to know how to solve simple, single-variable equations in algebra? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 30th installment in his "Excel Statistics" series of free video lessons, you'll learn how to create a scatter diagram for 2 quantitative variables.
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 225th installment in their series of digital spreadsheet magic tricks, you'll learn how to do a two-variable lookup when there are duplicates using the INDEX, IF, ROW and MAX functions.
Encryption is the process of converting you data in to other obscure form so that no one can read it. Encryption can also be done using batch files. Batch files are scripting programs in windows which can be used to program small automatic operations. To do this open a notepad to write the batch program. First turn of the echo by inserting the command '@echo off'. Now write the rest of the program as shown in the video. Now save the image as a bat file. Now you can encrypt this batch file. To...
In this video the instructor shows how to solve multi-step equations. In a multi-step equation, the equals to sign divides the two sides of the problem. To solve this kind of problem, the first thing
This video teaches you how to use substitution to find the point on a graph (the x and y coordinates) where two separate equations would cross. Substitution is a trick of algebra that allows you to find this point without making a graph. The first step is to isolate one of the variables (x or y) in one of the equations. That way, you know that that variable is equal to everything on the other side of the equals sign from it. You can then take that whole side, and substitute it into the other ...
Learn how to do two step math problems with this video tutorial.
In this tutorial the instructor discusses about the numeric coefficients that we come across while we work with polynomials. He goes on to discuss the numerical coefficient of a monomial stating that it is the number that is present before the variable in the monomial. He states that the numerical coefficient can also be negative or if there is no number present in front of the variable, it indicates that the numerical coefficient is one. This video helps in understanding what the numerical c...
Bucky from The New Boston serves up this Python video tutorial on how to program variables in Python. This is the program you use to write all of your Python code down. Fun with variables!
In this video tutorial, Chris Pels will show how information can be passed from one page to another using a query string. First, see how to construct a query string including variable names and values from information on a data entry form. Next, see how to access the query string information when the page is posted including how multiple query string variables are handled. As part of the server side processing of query string information, see how to implement validation for existence of query...
This VB.Net tutorial demonstrates popup boxes with variable input as well as the 'If' statement
In python, or any scripting language for that matter, there are certain things that you will carry with you throughout your entire scripting career. Some of the most basic things that you will keep with you are output, variables, and their value types. We'll start by going over output, then cover variables and their types. So, let's get started!
Format strings are a handy way for programmers to whip up a string from several variables. They are designed to save the programmer time and allow their code to look much cleaner. Unbeknownst to some programmers, format strings can also be used by an attacker to compromise their entire program. In this guide, we are going to look at just how we can use a format string to exploit a running program.
While our time with the Protostar VM from Exploit Exercises was lovely, we must move on to bigger things and harder challenges. Exploit Exercises' Fusion VM offers some more challenging binary exploitation levels for us to tackle. The biggest change is that these levels are all network services, which means we'll write our first remote exploits.
Hey readers! This tutorial will be the entry point for the introduction of buffer overflows. Something like requesting user input is a very common place for vulnerabilities to pop up and we will definitely have fun while trying to make programs crash. But for now, let's start with how we can get input from a user.
Before I start a series on remote exploitation, I think we should learn the basics of Perl. Perl, Ruby, C, C++, Cython and more are languages that some penetration testers just need to learn. Perl is a great language for multiple things, sadly, like many other scripting languages, it is limited by the environment in which it is designed to work in.
This video teaches us the concept of nth roots. The video starts with the square root of constants. We find the number which when multiplies by itself for two times results in the constant inside the square root. Then we find the square root of variables. Here again the same concept is used. We find the variable which when multiplied by itself for two times results in the given variable. Then we find the cube root. Here we find the number which when multiplied by itself for three times result...
Welcome back, everyone! In this lesson, I'm going to go over the use of the echo function and variables, as well as basic syntax.
Hello null_byters, after some time out here we are again with another tutorial, continuing our beautiful series, today we will write our first real world bash script.
Last time in how to train you python, we covered the basics of variables and output. While we were covering variables, we talked briefly about strings. "String" is just a fancier way of saying "Word". A string is simply a set of characters encased in quotations, this lets python know that it is a word. Sometimes when we do things with strings we'll need to change them in order to do something. Python is case sensitive, for example "Null-Byte" is not the same as "null-byte". This is where mani...
This tutorial provides some more useful information for PHP beginners. You'll get a quick overview about post, get and request superglobal variables. From this you'll learn how to handle a URL and a form. Don't be shy, jump in and see if PHP is right for you.
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to graph a linear equation in two variables in intermediate algebra.
This video is on Golf and will show you how to use the variable tee drill to cure a pull shot in golf. This video is from Golf Link. A typical problem for somebody who tends to pull the ball is they position the ball too far forward. So, when they are setting up, the shoulders are actually looking left. By the time the club head reaches the ball during the swing, they are swinging around to the left producing the pull. The variable ball position drill will cure this problem. Place a club on t...
Learn how to find all your global expression variables within Houdini.
Want to program your own Java games and applications but don't know beans about object-oriented programming? Never you fear. This free video tutorial from TheNewBostonian will have you coding your own Java apps in no time flat. Specifically, this lesson discusses how to multiple methods and also instance variables inside a class when writing in Java. For more information, including detailed, step-by-step instructions, watch this helpful programmer's guide.
This video is about using the elimination method to solve a linear system. The lady presenting this video says that elimination method means that one of the two variables has to be eliminated while adding up the two linear equations. She then explains the example equations 6x-2y=66 and 5y=-29-2x. She asks you to first line up x and y. So the second equation is rewritten as 2x+5y=-29. Then she says that, to eliminate a variable, we should have their variables equal in value but of opposite sig...
Hey guys, in this tutorial, we are going to learn about the heap segment and how to use it for storing data in our programs. We will also go into the details of its use in conjunction with the char pointer and struct data types.
Welcome, in this tutorial we shall we looking at creating a safe(r) way to back up your important files. The contents we will be covering are as follows;
