How Does a Domain Name System Work

If you’ve ever accessed a website, then you’ve interacted with the Domain Name System (DNS). DNS is a critical component of the internet infrastructure that translates domain names, such as www.example.com, into their corresponding IP addresses, allowing internet-connected devices to locate and communicate with each other. In this article, we’ll explore how the Domain Name …

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How to Fix Nginx Bad Gateway 502

Nginx is a popular web server that is often used to manage website traffic. However, even with its excellent performance and reliability, Nginx can still encounter issues that can disrupt website functionality. One of the most common problems is the Nginx Bad Gateway 502 error. In this article, we will guide you through the steps …

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How to Check the PHP Version on Linux

PHP is a widely used open-source programming language that powers many websites and web applications. It is constantly evolving, with new versions being released regularly. As a system administrator, system developer or webmaster, it is important to know which version of PHP is running on your server to ensure compatibility and security. In this article, …

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How to Serve PHP with PHP-FPM and NGINX

PHP-FPM (FastCGI Process Manager) is a specific implementation of FastCGI for PHP application. It provides a better way to manage and scale PHP processes separately from the web server. In combination with the NGINX web server, PHP-FPM can help you serve PHP applications with improved performance, reliability and more efficient use of server resources. While …

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Understanding Linux Average Load: What it is and How to Interpret it

Linux is one of the most popular operating systems used by data centre system administrators and IT professional worldwide. When it comes to monitoring the health of Linux system, one of the most important metrics to understand is the “Average Load.” In this article, we will explain what the average load is, how it is …

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How to Remove Duplicate Lines in Linux

Duplicate lines in text files can be frustrating and can cause problems for processing and analysis. In this article, we will explore how to remove duplicate lines in a text file using command-line tools. We will provide step-by-step instructions, including examples, so you can easily follow along on how to remove duplicate lines in linux. …

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How to Increase Java Heap Size for JVM in Apache Tomcat

Apache Tomcat is a popular web application server that is widely used for deploying Java-based web applications. By default, Tomcat is configured with a fixed heap size for the Java Virtual Machine (JVM), which can cause issues if the application requires more memory than what is available. In such cases, it is necessary to increase …

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15 Useful Rsync Command Line with Examples in Linux

In today’s technological era, data backups are a vital necessity for everyone. With an abundance of data, we need to ensure that our data is always safe, secure, and backed up. In this article, we will explore an incredibly powerful and versatile tool, rsync, which is widely used for backup and synchronization purposes the the …

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How to Fix “wget: command not found” in Linux

“wget” is a command-line application in Linux that is used to download files from the internet. It is often used for downloading big files, downloading entire directories recursively, and downloading data using various protocols such as HTTP, HTTPS, and FTP. Nevertheless, sometimes when you try to use the “wget” command, you may see an error …

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