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How To: Security-Oriented C Tutorial 0x21 - Linked Lists

Welcome to the final tutorial of the series on standard C. This article will cover the linked list abstract data type (ADT). There will be a lot of abstraction to try to deliver the understanding in the most basic way for easiest interpretation of what they are and how they work, then we will get into the guts of it and learn the technical code underneath. For those who have yet to grasp the concept of pointers, it's advisable that you do that first before approaching this. Having learned thi...

How To: Become a Hacker

Many of our members here at Null Byte are aspiring hackers looking to gain skills and credentials to enter the most-valued profession of the 21st century. Hackers are being hired by IT security firms, antivirus developers, national military and espionage organizations, private detectives, and many other organizations.

From Beans to Your Cup: A Coffee Primer

To say we're a nation of coffee-lovers is putting it mildly. Americans consume 400 million cups of joe in one day alone, but how well do we actually know our morning BFF? We know it comes from a bean, and that more coffee drinks exist than there are ways to skin a pig, but what else?

How To: Add More Domain Extensions to Your iPhone's Keyboard Shortcut to Type Email Addresses or Website URLs Faster

When typing an email or website address in a compatible input field on an iPhone, most people will manually type in the domain extension. But there's a much faster way to enter domain suffixes for email addresses and website URLs that you should be using on your keyboard. Even better, there's a way to customize what domain extensions appear in the keyboard shortcut!

How To: 12 Reasons Why You Should Be Using Text Replacements on Your iPhone, iPad, or Mac

You probably know of Apple's Text Replacement feature for iOS, iPadOS, and macOS, but you're probably not using it as much as you should. With it, you can create your own keyboard triggers for almost anything you can think of, whether it's an email address or an entire email. There are endless reasons to create custom text replacements — and we'll show you why.

How To: Unlock the Apple Logo Emoji on Your iPhone, iPad, or Mac

Thousands of emoji are available on iPhone, iPad, and Mac, and you can use these in many of the apps you have installed on your Apple devices. But there's one emoji you'll likely never see on any of Apple's official emoji keyboards, and its absence may surprise you at first, considering it's embedded in virtually every Apple product. That emoji is, of course, the Apple logo icon.

How To: Make Siri Say Whatever You Want Every Time You Connect Your iPhone to a Charger

Whenever your iPhone's ringer is on, you'll hear Apple's iconic "Connect Power" chime every time you connect it to a wired or wireless power source, which lets you know that charging has started. There's no way to disable the sound without turning on Silent mode, but there is a way to make Siri automatically say whatever you want after a successful connection.

How To: Clicks Gives Your iPhone a Physical Keyboard with Shortcuts, Backlighting, and More

When Steve Jobs introduced the first iPhone, he pointed out that the biggest problem with physical keyboards on mobile phones is that they're always there, whether you need them or not. Now, 17 years later, a new company is bringing us full circle, giving us the best of both worlds: a physical keyboard for iPhone that can disappear whenever you want.

How To: The Flexispot E7 Pro Plus Electric Standing Desk Is Great for Any Home Office

When setting up your home office or giving it a makeover, the desk is the key to making the room a functional workspace. And if you're in there all day, it also has a significant impact on your health. Standing desks can help offset some of the adverse health risks associated with sitting all day, but it's hard to find a decent standing desk that won't break the bank. That's where Flexispot comes in.

How To: Get Water Out of Your iPhone's Speaker with a Simple App

Whether you drop your iPhone into a toilet or your dog's water bowl or regularly take it into the shower or pool, water will likely become nestled inside its speaker grilles. Water exposure causes audio playback through the speakers to soften and sound muffled, and getting that water out is no easy task. Luckily, there's an app for that.

How To: Download the Real Wordle Game on Your Phone for Years of Free Offline Gameplay

The hottest word game right now is Wordle, a simple game that gives you six chances to guess the five-letter word of the day. I've already shown how you can add the real Wordle app — not a fake clone — to your iPhone or Android phone's home screen. But there's also a way to save Wordle for offline gameplay for years to come.

How To: T-Mobile Is Automatically Selling Your Data to Advertisers — Here's How to Opt Out

It's getting harder and harder to escape ad tracking by the day. For the latest example, look no further than T-Mobile. The No. 2 carrier updated its privacy policy on Feb. 23, 2021, indicating that it would start sharing customer data with advertisers under the guise of more relevant ads starting April 26. If that's not something you'd like to participate in, there's a way to opt-out.

How To: Auto-Remove Annoying Tracking Codes in URLs You Share from Your iPhone to Get Cleaner Links

URL tracking codes: you'll see them on almost every link you copy online to share with friends and followers. It could be tens or hundreds of extra characters appended to the end of a URL, which websites and marketers use to tell how you got to the link in the first place. These excess tracking tokens not only make the links you share look sloppy and spammy — they could even invade your privacy.

How To: Quickly Generate a Strong Password on Your iPhone When iCloud Keychain Won't Work

Apple's password manager, iCloud Keychain, lets you securely save important login credentials for apps, websites, and services that sync up across all of your Apple devices — iPhone, iPad, iPod touch, and Mac. One of its biggest highlights is that it can create strong passwords for you. Unfortunately, it doesn't always work, and in those cases, there are other ways to generate random, strong passwords.

How To: 5G Data Won't Work on Your New iPhone 12 or 12 Pro Unless You Do This

One thing you can expect from Apple is that big features work right out of the box. The company designs its products to be easy to use for any experience level, so you might expect the same to be true for 5G, one of the biggest selling points for the iPhone 12, 12 mini, 12 Pro, and 12 Pro Max. Yet, you might have trouble getting 5G to work on your brand new iPhone. Here's how to avoid that.

How To: Tag Contacts in iMessage Group Chats on Your iPhone in iOS 14

Directing a message at a specific person in a group conversation, or to a select few people in the group, can be difficult if you're in a particularly active or hectic chat. Notifications and badges on your iPhone can help you keep track of important messages, but it's still easy to miss one meant for you and not the entire group — which is why you can now mention contacts, or get tagged, in Messages on iOS 14.

How To: There's a New App Library on Your iPhone's Home Screen — Here's Everything You Need to Know About It in iOS 14

Are you tired of endless rows and columns of apps on your home screen? Before iOS 14, your only option was to hide apps in folders, uninstall them, or use some sort of elaborate workaround. You could hide a few stock apps easily enough, but that's it. Now, in the latest version of iOS, you can hide apps for real, and even hide entire home screen pages, and still access the apps in one convenient drawer.

How To: Trigger iMessage Effects with Just a Keyword

One of the coolest aesthetic features of iMessage is its animated message effects. If you're like many users, you might even have discovered them by accident, where wishing your friend a "Happy Birthday!" or congratulating them on a promotion unexpectedly flooded your screen with balloons or confetti.

How To: Upgrade a Dumb Shell to a Fully Interactive Shell for More Flexibility

One of the most exciting things as an ethical hacker, in my opinion, is catching a reverse shell. But often, these shells are limited, lacking the full power and functionality of a proper terminal. Certain things don't work in these environments, and they can be troublesome to work with. Luckily, with a few commands, we can upgrade to a fully interactive shell with all the bells and whistles.