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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to create multiple level subdomains with apache2 and or PHP
Subdomains are a powerful way to organize your website into distinct sections, making navigation easier for visitors. Creating multiple level subdomains like blog.example.com or shop.blog.example.com can be accomplished efficiently using Apache2 web server configuration and PHP scripting. This approach allows for flexible website architecture and improved content organization. What are Subdomains? Subdomains create separate sections of your website with unique URLs. Instead of placing all content on www.example.com, you can create dedicated areas like blog.example.com for articles or shop.example.com for e-commerce. This structure improves user experience, simplifies content management, and can enhance SEO by creating focused content areas. ...
Read MoreDisk Formatting
Disk formatting is the process of preparing a storage device, such as a hard drive or USB flash drive, for use by initializing its file system and creating a directory structure for storing files. This process allows the device to be recognized by the operating system and enables the storage and retrieval of data. Definition of Disk Formatting Disk formatting is like giving a blank slate to a storage device, preparing it to store new data by erasing any existing information and creating a structure for organizing files. It involves erasing any existing data, setting up a file ...
Read More10 Examples of How to Use New Advanced Package Tool (APT) in Ubuntu/Debian
Advanced Package Tool (APT) is the default package management system for Ubuntu and Debian Linux distributions. It provides a powerful command-line interface for installing, updating, removing, and managing software packages. APT simplifies software management by automatically handling dependencies and maintaining package integrity. Updating the Package Cache Before installing or updating packages, it's essential to refresh the package cache. The package cache contains information about all available software packages in the configured repositories. sudo apt update This command downloads the latest package information from all configured repositories and updates the local package database. Installing ...
Read MoreDigitally Sign Documents in Linux Using ONLYOFFICE Desktop Editors
Digital signatures are an essential aspect of document security in modern computing. They ensure that the document hasn't been altered and that it comes from a trusted source. Digital signatures are widely used in business, legal, and government settings, but they're also useful for personal documents. ONLYOFFICE Desktop Editors provides Linux users with a comprehensive solution for digitally signing documents using cryptographic methods. What is a Digital Signature? A digital signature is a mathematical technique used to verify the authenticity and integrity of a digital document or message. It provides a way for the recipient of a document ...
Read MoreWhat is a system call?
A system call provides an interface between a user program and the operating system. It is a programmatic way in which a computer program requests a service from the kernel of the operating system. When a user wants to give an instruction to the OS, it does so through system calls. System Call Interface User Applications (Text Editor, Web Browser, etc.) System Calls System Call Interface ...
Read MoreHow to write Stdout to a file with colors?
When working with command-line tools that produce colorized output, preserving these colors when redirecting to files can be challenging. By default, most programs detect when their output is redirected and strip away ANSI color codes. This article covers various methods to capture colored terminal output in files while maintaining the original formatting. Using Grep with Color Preservation The grep command searches for text patterns using regular expressions. To preserve colors when redirecting output, use the --color=always option. Syntax $ grep [options] pattern [files] Example First, create a sample file and then use ...
Read MoreRunning a Shell Script on a Remote Machine Through SSH
SSH (Secure Shell) is a network protocol that allows secure remote access to Linux-based machines. It enables users to execute commands and run shell scripts on remote servers without physically accessing them. The SSH protocol encrypts all data transmission between client and server, ensuring secure communication over potentially unsafe networks. What is SSH SSH stands for Secure Shell or Secure Socket Shell. It provides a secure channel for accessing remote servers by encrypting all data transmitted between the client and host. SSH operates on TCP port 22 by default and replaces insecure protocols like Telnet and rlogin. ...
Read MoreHow to Clean a Linux Zombie Process
A Linux zombie process is a process that has completed execution, but its parent process has not yet collected its exit status. These processes remain in the system's process table consuming minimal resources but can accumulate over time. Understanding how to identify, handle, and prevent zombie processes is essential for maintaining system health. Zombie processes occur when a child process finishes but the parent hasn't called wait() or waitpid() to read the child's exit status. The process becomes a "zombie" − neither fully alive nor completely dead. What Are Zombie Processes When a process terminates, it doesn't ...
Read MoreMulti Pointer X (MPX) support
Multi Pointer X (MPX) support is a feature of the X Window System that enables multiple users to interact with a single computer simultaneously, each with their own keyboard and mouse. This capability transforms a single workstation into a collaborative platform where several people can work independently on the same machine, making it valuable for educational environments, design studios, and accessibility applications. What is Multi Pointer X (MPX) Support? The X Window System is a foundational windowing system used on Unix-like operating systems such as Linux and macOS. Traditionally, X servers handle input from a single keyboard and ...
Read MoreHow Do so (Shared Object) Filenames Work in Linux
Shared Objects (SO) are dynamic libraries in Linux that contain code and data shared between multiple processes. Similar to DLLs in Windows, SO files enable efficient memory usage and modular programming by allowing multiple programs to share the same library code loaded in memory. What are Shared Objects? Shared objects are files containing executable code and data that can be loaded and linked at runtime. When a program needs functionality from a shared library, the dynamic linker loads the SO file into memory and makes it available to the requesting process. Multiple programs can simultaneously use the same ...
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