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Are you developing a multi-threaded application? Sooner or later, you will likely need to use a Semaphore. In this article, you will learn what a Semaphore is, how to create/implement one in Bash, and more. What Is a Semaphore? A semaphore is a programming construct that is used in computer programs that employ multiple processing threads (computer processing threads which each execute source code from the same program or same suite of programs) to achieve exclusive use of a common resource at a given point in time....

“Be sure to use a strong password” is advice we all constantly see online. Here’s how to create a strong password—and, more importantly, how to actually remember it. Using a password manager helps here, as it can create strong passwords and remember them for you. But, even if you use a password manager, you’ll at least need to create and a remember a strong password for your password manager....

Swap Files vs. Swap Partitions There are several scenarios where you might want to increase existing or add new swap space to your Linux computer. Perhaps your swap space is frequently running at maximum or close to maximum. It’s easy to click the wrong option during the installation process and to decline adding swap to your system inadvertently. Maybe you previously decided that you had so much random access memory (RAM) you didn’t need any swap, and you’ve changed your mind....

Footnotes are great for providing additional information without taking up too much space. With there being a finite amount of space on each slide in PowerPoint, footnotes may be just the thing you need. Here’s how to add them to your next presentation. Open PowerPoint and navigate to the slide in which you would like to insert a footnote. Next to the text that needs a footnote, insert a number or symbol....

Setup Blog Account Open Word 2010 and click on the File tab to access Backstage View. Click on New then double click Blog post. You’ll be presented with the option to register your blog account, find compatible blog services, or register later. When you register your blog, select the provider from the dropdown menu. Next enter the blog URL, User Name, and Password. Writing Blog Post Creating your blog post is similar as it was in Office 2007, but now there are additional features....

To create Arrows in Photoshop, first, select the path or object you want to convert into an Arrow and then click on the “Arrow” tool in the toolbar. You can then adjust the properties of the Arrow by clicking on the “Head” property button and selecting a different arrowhead style from the drop-down menu. To make an arrow shape in Photoshop 2020, you can use the Pen tool and draw a line from the top of one corner of the arrow to the bottom of the opposite corner....

There are a few ways to make something look like glass in Photoshop. One way is to use the Gaussian Blur filter. Another way is to use the Glass effect. In Photoshop, you can use the Filter > Glass → Render As a filter to make something look like glass. The glass effect is a visual distortion that can be created in Photoshop by applying a Gaussian blur to an image....

Standard keyboards don’t have dedicated keys for special punctuation marks, such as an en or em dash, if you want to use them in Google Docs. Here’s how you can create hyphens and dashes in your documents. As we are a technology website, we won’t go into detail about when and how to use each form of punctuation. Instead, you can check out what a hyphen, en dash, and em dash are if you’re unsure when to use each punctuation mark....

Firefox themes — also known as “personas” — can change the way your browser looks, making it more personal. If you like theming the applications you use, there’s no better application to theme than your browser. This isn’t too hard — all you need to do is find a background image or two and crop them to the correct proportions. Chrome users can use Google’s easy Chrome theme creator to make their own browser themes....

Creating Ringtones Using iTunes in Windows Its not that difficult to create a ringtone using iTunes on a Mac or PC. Here I’m doing it on a Windows system, but the process is similar on a Mac. Launch iTunes and select the song you want to convert to ringtone. After that, right click on the song and click on Get Info. Then click the Options Tab. The ringtone can be of maximum 30 seconds so its up to you whether you want to make it 30 secs or shorter....

The shortcut to crop an image in Illustrator is to use the command “Crop” on the keyboard. There is no definitive answer to this question. However, some tips on how to crop in Illustrator 2022 may include using the rulers or guides to help you plan your layout, using a crop tool that is specifically designed for Illustrator, or using a software program like Adobe Photoshop or Illustrator CC to help you create accurate and consistent results....

To crop an image in Illustrator 2021, use the following steps:Choose the Image > Crop tool.Choose the size and shape of the cropped image.Click OK. To crop in Illustrator 2022, open the File menu and select “crop.” Then, choose the size and position of the crop. To crop an image in Illustrator, use the Command+C shortcut. AI can’t crop images. The crop tool is located on the Tools panel of Illustrator....

There are a few ways to cut out a shape in a photo in Photoshop. You can use the following methods:Use the Pencil tool to draw a line around the shape you want to create. Then, use the Point tool to make the line point towards the center of the shape.Use the Curl tool to curvature the edges of the shape.3. There are a few ways to cut out shapes from pictures....

There is no one easy way to cut out a picture. Depending on the size of the picture, there may be different methods that work best. There are a few ways to cut an image out of a picture. One way is to use a sharp object such as a knife or razor to cut through the photo’s plastic backing and then peel it away. Another way is to use scissors to cut through the photo’s plastic backing and then cut the image out....

Yes, you can activate your PS4 as your primary online device. This will allow you to sign in to PlayStation Network and use your account with most of the features that are available online. If your PS4 is set up as a primary system, you can force it to become the primary system by doing the following:Go to Settings on your PS4.Select System.Select Primary System.Select Yes to confirm. To deactivate your primary PS4 from your Sony website, log into your account and select “My PS4....

To deactivate all PlayStation devices from your account, you will first need to create an account on PlayStation.com and then create a new PlayStation Network account. After creating your new account, go to “Account Settings” and then “Device Deactivation.” Under “Device Deactivation,” you will need to set the following options:Disable all devices: This setting will disable all devices on your PlayStation network, including your PlayStation 4. One way is to use the PS4’s built-in security feature, “Remote Play....

Yes, RoboKiller does work on the iPhone. It is an app that helps to block spam calls and protect your privacy. Yes, RoboKiller is a free app for iPhone. It’s designed to protect you from spam calls, and it’s been featured by Apple as one of the best new apps of the year. If you’re having trouble getting rid of RoboKiller on your iPhone, you can try the following steps:Open the Settings app and tap on RoboKiller....

Use an External Database or Object Store This is the method that most people will recommend. Storing state as a file on disk isn’t in line with Docker’s model, and while it can be done, it’s always best to consider—do you really need to? For example, let’s say you’re running an a web application in Docker that needs to store data in a database. It doesn’t make much sense to run MySQL in a Docker container, so you should instead deploy MySQL on RDS or EC2, and have the Docker container connect to it directly....

To delete a drawing on MediBang, first, open the drawing in question and click the three lines in the top-right corner. Then select “Delete Drawing. There is no easy way to delete a custom brush on Ibispaint, but you can try deleting the brush file itself. If that doesn’t work, you can try deleting the folder where the brush is stored. There are a couple of ways to change the brush on a MediBang PC....

Yes, you can delete a single color in Photoshop. To do so, select the color you want to delete and click the Delete key. There are a few ways to remove colors from pictures. One way is to use a photo editor such as Adobe Photoshop or Microsoft Paint. Another way is to use a color removal kit. There are a few ways to remove color from layers:Use a hairdryer: Heat the hair until it’s hot, then work the heat through the hair, taking care not to damage the hair too much....