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Articles on Trending Technologies
Technical articles with clear explanations and examples
SetUID, SetGID, and Sticky Bits in Linux File Permissions
File permissions in Linux provide privileges to owners and administrators to control access to programs and files. Standard permissions (read, write, execute) are set using chmod and chown commands. Beyond basic permissions, Linux provides special permissions: SetUID, SetGID, and sticky bits. These special permissions modify the default behavior of file execution and access, requiring careful consideration due to potential security implications. SetUID (Set User ID) When SetUID is enabled on an executable file, the program runs with the permissions of the file's owner, not the user executing it. This allows regular users to execute programs that require elevated ...
Read MoreTheSpeedX / TBomb – Call and SMS Bomber for Kali Linux
TBomb is a penetration testing tool developed by TheSpeedX for educational and authorized security testing purposes. This tool demonstrates potential vulnerabilities in communication systems by simulating bulk messaging and calling scenarios. Important: This tool should only be used on systems you own or have explicit permission to test, as unauthorized use may violate laws and terms of service. Installation Process To install TBomb on your Kali Linux system, follow these steps − Open a terminal in your Kali Linux environment. Clone the TBomb repository from GitHub − git clone https://github.com/TheSpeedX/TBomb.git ...
Read MoreInstall RedMail with Virtual Domains, Webmail, SpamAssassin & ClamAV in Linux
Email communication remains an integral part of our personal and professional lives. Setting up a reliable and secure mail server is crucial for efficient communication within organizations or for personal use. Mail-in-a-Box (commonly called RedMail) is a fully-featured mail server solution that offers a comprehensive suite of tools to create virtual domains, access webmail, and enhance email security with SpamAssassin and ClamAV. In this article, we will guide you through the process of installing Mail-in-a-Box on a Linux system. Prerequisites Before diving into the installation process, ensure you have the following − A clean Ubuntu 18.04 ...
Read MoreMicrosoft Windows (10) Vs macOS (Mojave)
Microsoft Windows 10 is the flagship operating system from Microsoft Corporation, released in 2015. It has become one of the most widely-used desktop operating systems globally, offering a customizable user experience, robust security features, and extensive compatibility with diverse hardware and software platforms. macOS Mojave is Apple Inc.'s desktop operating system, released in 2018 exclusively for Apple devices. It provides a streamlined user interface, strong security measures, and seamless integration with other Apple products like iPhones and iPads. This article compares these two popular operating systems, examining their key differences, advantages, and limitations to help users understand which ...
Read MoreHow to Open Port for a Specific IP Address in Firewalld?
In today's interconnected world, network security is of utmost importance. One essential aspect of securing your network is managing the access to specific ports on your system. Firewalld, a dynamic firewall management tool, provides a flexible and user-friendly approach to firewall configuration in CentOS and other Linux distributions. This guide will focus on a common scenario: opening a port for a specific IP address in Firewalld. By allowing access only to specific IP addresses, you can enhance the security of your system and restrict unauthorized access through rich rules that provide granular control over traffic. Understanding Firewalld Zones ...
Read MoreTips to Manage Docker Containers Using CLI
Docker has revolutionized how we create, ship, and deploy applications through lightweight containerization. While Docker provides a graphical interface, the command-line interface (CLI) remains the most powerful tool for efficiently managing containers. This article covers essential CLI tips for Docker container management with practical examples. Installing Docker CLI Before managing Docker containers, ensure Docker CLI is installed on your system. Docker CLI is available for Windows, macOS, and Linux. Visit the official Docker website to download and install the appropriate version for your operating system. Basic Container Operations Starting and Stopping Containers Start a container ...
Read MoreInstall Adobe Flash Player 11.2 On CentOS/RHEL 7/6 and Fedora 25-20
Adobe Flash Player 11.2 was a widely used multimedia platform that enabled users to view interactive content, play online games, and stream videos. While Adobe officially discontinued Flash Player support in 2020, some legacy systems and applications still require Flash Player 11.2 to function properly. This guide covers installing Adobe Flash Player 11.2 on CentOS/RHEL 7/6 and Fedora 25-20 systems. Prerequisites Before proceeding with the installation, ensure you have the following − A CentOS/RHEL 7/6 or Fedora 25-20 system with administrative privileges A web browser such as Mozilla Firefox or Google Chrome installed Internet connection for ...
Read MoreScheduling with Deadline
Scheduling with deadlines is a fundamental concept in operating systems and real-time computing where tasks must be completed within specified time constraints. The primary objective is to allocate CPU time and system resources efficiently while ensuring that critical tasks meet their deadlines, minimizing lateness and system failures. This scheduling approach is essential in time-critical systems where missing a deadline can have severe consequences, such as safety-critical applications, real-time communication systems, and multimedia streaming. Understanding deadline-based scheduling helps system designers create robust algorithms that optimize performance while guaranteeing timely task execution. How Deadline Scheduling Works In deadline scheduling, ...
Read MoreHow to Open, Extract and Create RAR Files in Linux?
RAR is a popular file compression format known for its efficient compression algorithm and ability to compress large files into smaller archives. While Linux natively supports common archive formats like ZIP and TAR, working with RAR files requires additional tools. In this guide, we will explore how to open, extract, and create RAR files in Linux. Whether you've received a RAR file and need to extract its contents or want to compress files into a RAR archive, we will cover the necessary steps and tools to accomplish these tasks. We will explore both command-line methods and advanced options, giving ...
Read MoreInstall and Configure Caching-Only DNS Server in RHEL/CentOS 7
DNS (Domain Name System) plays a crucial role in translating domain names into IP addresses, allowing users to access websites using human-readable URLs. To enhance DNS performance and reduce network latency, implementing a caching-only DNS server can significantly improve the speed and efficiency of DNS lookups. In this article, we will guide you through the process of installing and configuring a caching-only DNS server in RHEL/CentOS 7. Prerequisites Before proceeding, ensure that you have the following − A server running RHEL/CentOS 7. Root or sudo access to the server. Basic knowledge of the Linux command line. ...
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