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Encountering the “extconf.rb failed” error during gem installation can be a real headache for Ruby developers. Let’s break down what this error means and how to tackle it effectively. What is the “extconf.rb failed” Error? When you try to install a gem that includes native extensions, Ruby uses a script called extconf.rb to check for … Read more
One of the most important factors when troubleshooting the performance of an application or website, is the performance of the database. Improper indexing or inefficient SQL queries can kill the performance of your application rendering it useless. It is amazing what a simple tweak or change to a SQL statement can do. I have seen … Read more
PostgreSQL is a powerful, open-source relational database system that’s widely used for its reliability and flexibility. If you’re setting up PostgreSQL on CentOS, you’re in the right place. This guide will walk you through the installation process, from adding the necessary repository to configuring the database for remote access. Step 1: Set Up the PostgreSQL … Read more
If you’re working on CentOS and need to install Ruby, there are a few ways to get it done. Whether you need the default version for simple tasks or want the latest release for a specific project, this guide has you covered. Let’s walk through the top three methods to install Ruby on CentOS. Method … Read more
When you log into a Linux system, especially via SSH, you might notice a message displaying the time and date of your last login. This feature, while useful for tracking access and detecting unauthorized logins, may not be necessary for everyone. Some users prefer a cleaner terminal interface without distractions. In this guide, we’ll show … Read more
RubyGems is a package manager for Ruby, allowing developers to install, update, and manage Ruby libraries (gems) easily. If you’re working with Ruby on Ubuntu Linux, having RubyGems set up is essential for accessing the vast ecosystem of Ruby packages. This guide explains the steps to install RubyGems on Ubuntu, making it quick and hassle-free … Read more
Running into trouble with the sqlite3-ruby gem and seeing errors about extconf.rb or mkmf? Don’t worry—you’re not the only one. This is a pretty common snag, especially for folks working on Ruby projects that use SQLite as their database. The good news? It’s not as scary as it looks. Here’s how to fix it. Why … Read more
Welcome to this tutorial that will describe how to SSH to a Linux, Windows, etc. server using Ruby. This post will give you a complete code example to get you up and running right away! The code below will connect to the server specific and run the ls -al command. Be sure to change the … Read more
Ever wondered why Linux users love converting PDFs to text? It’s a common task. Whether you’re dealing with research papers or contracts, converting PDFs to plain text makes handling them a breeze. If you’re a Linux fan or just diving into its capabilities, mastering PDF conversion is a handy skill. Linux has a bunch of … Read more
Do you need an ultra fast way to create a large number of files in Linux? Perhaps, you are doing some load testing for an application and you need to create 1000 or even 1,000,000 files in the matter of seconds. Well, here is how to do it! There are two parts to creating these … Read more
Reloading PostgreSQL settings without restarting keeps your database running smoothly. It ensures updates to files like postgresql.conf and pg_hba.conf apply right away without stopping queries or breaking connections. This guide explains three methods to reload settings, shares useful tips, and offers troubleshooting advice. Why Reload PostgreSQL Configurations? When you update files such as: changes don’t … Read more
Monitoring table and row locks in PostgreSQL helps keep your database running efficiently. Locks are essential for maintaining data integrity but can sometimes cause performance issues if they persist for too long. This guide provides a clear and easy way to check for active locks in your PostgreSQL database. Step 1: Access the PostgreSQL Command-Line … Read more
If you’re working with a PostgreSQL database, keeping tabs on active queries is a must to keep things running smoothly. Let it slide, and you could end up with sluggish performance—or even a database that stops working altogether. The upside? PostgreSQL has built-in features to help you stay on top of what’s happening. This guide … Read more
This article will show you how to determine when your database tables were last vacuumed, auto-vacuumed, analyzed, and auto-analyzed on a PostgresSQL database. Performing these operations are critical in keeping the database optimized and performant. What is the purpose of PostgreSQL Vacuum? PostgreSQL’s “VACUUM” is a maintenance operation designed to reclaim storage occupied by expired … Read more
If you recently upgraded from Windows XP to Windows 7, you may be wondering where the Run… option in the Start menu went. I use this option in XP regularly to quickly launch programs like Notepad and the Command Prompt, so it was annoying when I tried doing this in Windows 7 only to find … Read more
This article will show you how to add a network printer on a Ubuntu 9.10 system. Let’s go ahead and get started… Navigate to System –> Administration –> Printing Then choose Server –> New –> Printer from the Printer configuration window The New Printer wizard will be displayed. Here you can add either local or … Read more
This article will show you how to add the “Show Desktop” icon that is present in Windows XP and Vista, to the Windows 7 taskbar. Windows 7 got rid of this icon and replaced it with a Aero Peek/Show Desktop button on the bottom right corner of the screen, near the System Tray. Many users, … Read more
Linux is a highly efficient and flexible operating system, but there are times when processes can misbehave, slow down the system, or consume excessive resources. In such cases, it may be necessary to terminate one, multiple, or even all processes. This guide provides a detailed explanation of how to kill all processes in Linux using … Read more
If you’re running Ubuntu 9.10 and want to tweak your display settings, adjusting the screen resolution is a quick fix. Whether you’re trying to match your monitor’s native resolution or just make things look sharper, Ubuntu 9.10 has tools to help you get it done. Let’s walk through the steps to change the screen resolution, … Read more
Aero Snap, introduced with Windows 7, is a feature designed to improve multitasking by allowing users to quickly resize and arrange windows by dragging them to the edges of the screen. While this can be a productivity booster for many, some users find it disruptive or unnecessary. If you’re among those who prefer a traditional … Read more
If you love reading Kindle books but don’t own a Kindle device, don’t worry! You can access your Kindle library on your PC without spending a dime. Whether you want to enjoy a novel, a textbook, or a technical guide, Amazon offers several free options to make reading easy and accessible. Here’s how you can … Read more
Overscan can disrupt your Windows 10 setup, especially when connecting to HDTVs. Think of it as your TV stubbornly cropping the screen’s edges, reminiscent of vintage CRT monitors. While tinkering with those screens was once standard, overscan shouldn’t still hinder your experience today by cropping off essential parts of your display. About Windows 10 Overscan … Read more
Adobe Photoshop, a household name in the realm of image editing, has been setting the standard for photo manipulation and digital artistry since its inception. Its unrivaled suite of features, coupled with a robust and flexible workspace, has made it a go-to choice for professionals across the graphic design, photography, and digital marketing industries. Photoshop’s … Read more
What Is the Snipping Tool? The Snipping Tool in Windows 7 is a handy built-in utility that lets you capture screenshots easily. Whether you’re creating a tutorial, troubleshooting a problem, or saving an image for future reference, this tool is a lifesaver. Unlike the traditional Print Screen method, the Snipping Tool allows you to grab … Read more
This article will show you are to disable UAC (User Access Controls) aka those pesky popup dialogs where you must enter your password in Ubuntu Linux! As many of you know, this feature was implemented in Windows Vista but went horribly wrong and is the reason it has been removed in Windows 7. Linux, which … Read more