### Hack Like a Pro: Linux Basics for the Aspiring Hacker, Part 9 (Managing Environmental Variables)

Welcome back, my aspiring hackers!

Welcome back, my aspiring hackers!

Hello again, reader! In this post, we are going to cover some data types and how to declare variables. It shouldn't be too hard so just sit back, relax, grab some popcorn and enjoy the ride (while you still can!).

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.

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!

Welcome back my friends !! Today we'll go through the second part of this C# series

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.

Mixing water and electricity is extremely risky and potentially lethal, yet that's exactly what I did with the Scariac. In its simplest form, the Scariac is just a glorified version of two wires in a bucket of water, but it's actually one of the cheapest power controllers you can make.

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 255th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a two-variable data table in Excel for what-if analysis. See the PMT function and learn about the formula equivalent to a data table.

Could you use some help figuring out how to solve equations involving fractions in basic algebra? See how it's done with this free video math lesson. Need help finding the 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 ...

Looking for a Variable-ND filter without having to spend $300? There's a way that you can actually make your own for as little as $10-$20 using some cheap circular polarization filters! Instead of getting a picture tutorial, in this video, you will get a fully commentated walkthrough of the process that he uses to remove the lenses and more to create his own filter!

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 TheNewBoston will have you coding your own Java apps in no time flat. Specifically, this lesson discusses how to make a variable-length argument list when writing code in Java. For more information, including detailed, step-by-step instructions, watch this helpful programmer's guide.

In basic algebraic equations all the variables are on left side of the equation. But as the complexity of the problems increases you will find that the equations will contain variables on both sides of the equation. To solve these kinds of problems first simplify the equations on each side of the equation. You can use the distributive law to do this. Next try to cancel the variable on the right side of equation by adding the negative value of that variable to both the sides of the equation. N...

This video is aimed at beginner level viewers and shows one of the basic techniques involved while solving linear equations having one variable.

Math Problem Generator gives a video about how to add and subtract variables. All you have to do is combine the coefficient, which is the number that comes before the variable. The numbers are added or subtracted but the variable remains the same. In the video, the example given is 9x + 6x - x. First you add 9x + 6x, giving you 15x. The equation is now 15x - x. If a variable has no number written in front of it, that means the value is 1. So the equation is 15x - 1x and that is equal to 14x.

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.

In this video, we learn how to evaluate functions. When evaluating functions, you substitute in the variable to the input given. Once you do this, you will rewrite the equation filing in the appropriate spots with the numbers that you are given. After this, you will evaluate the equation with the proper steps in math. Once you have figured out the problem, you can do this in reverse to make sure you have the correct answer. This is a very easy process and it doesn't take that long. Just make ...

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 46th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to use the DOLLAR, VLOOKUP, INDEX and MATCH functions and a previous bracket commission formula trick to calculate total commissions when you have variable commissions paid out. Learn to love digital spreadsheets more perfectly with the tricks outlined in t...

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 216th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a pivot table (PivotTable) with 4-variable cross tabulation. Learn to use multiple fields in a pivot table with this free video tutorial.

Need help wrapping your head around algebraic equations? Watch 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). With this guide, you'll learn how to solve algebraic equations containing variables.

An educational video from Math Problem Generator that shows how to multiply variables. It is a very short video - about 1 min in length.

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...

If you're struggling a bit with algebra, check out this video to learn how to isolate a variable. Isolating a variable is a matter of separating and simplifying.

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...

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).

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.

This VB.Net tutorial demonstrates popup boxes with variable input as well as the 'If' statement

Need help figuring out how to solve simple algebraic equations? 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).

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 269th installment in their series of digital spreadsheet magic tricks, you'll learn how to get criteria from four (4) different cells and combine (join) them into one criterion for the COUNTIF function.

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...

Thinking of an unknown exponent as a cat stuck in a tree, you will see how to bring down the exponent by using the the log function. In other words, you will be utilizing the Power Law to bring the exponent down in front of the log function. In this slightly more complicated example, a little work has to be done to first be able to take the log (i.e., get the base by itself). Then once you take the log, the unknown still isn't entirely by itself, so you divide off everything it's being multip...

Not all inequalities are created equal. See how to solve three of the most common types with this free video algebra lesson, which discusses regular, negative and mixed-variable inequalities. 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).

Confused in math class and need some extra help? This educational video gives instruction on how to solve mathematical algebraic equations. It shows you how to break an equation down and make them less scary to solve. Step-by-step instructions show you how to solve more complicate equations when there is a variable on both sides of the equation. An instructional video for students who need some extra help on their math homework, or parents who can't remember what they learned in high school.

This video is a great one on learning about evaluating fractions. The voice explains how to first plug in the numbers given for each variable in the fractions. He also explains the importance of simplifying the top and bottom first before simplifying the entire fraction. He also explains ways that would not be helpful in solving the problem and comparing that with the correct way. Then he notes the use of your simple math rules to find the answer. Excellent video for viewers.

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 about Variable/Month-to-Month Energy Rates.

In this article, I'll be exploring the basics of Python, i.e. variables, input and output. You'll need Python (2.7+), a computer, and some free time.

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.

Learn how to use a 'do while loop' in your Java programming. 1. Set up an 'int' variable named 'counter' and assign it a '0' value. 2. Set up a standard 'do' loop. Make sure to add a counter, so the loop will end 3. Then write the 'while' condition. Make sure that you set the condition to the same variable name that you used in the counter from step 2. Set the variable to '=' 10 (or any number desired)

Next Page

Prev Page