Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
How to Get Root and User SSH Login Email Alerts?
Secure Shell (SSH) is a widely used protocol for securely connecting to remote systems over unsecured networks. It provides a secure channel for communication between two systems, allowing users to execute commands and manage files on remote machines without the risk of eavesdropping, tampering, or identity theft. However, despite its strong security features, SSH is still vulnerable to attacks from cybercriminals who seek to exploit weak passwords, unpatched software vulnerabilities, or misconfigured permissions. Therefore, it's essential to take proactive measures to secure your SSH access by implementing email alerts for login attempts. Setting up Email Alerts for Root ...
Read MoreCrontab Reboot_ How to Execute a Job Automatically at Boot?
Crontab is a widely used tool for scheduling tasks on Linux systems. It provides a simple way to automate routine tasks, such as backups, system maintenance, and data processing. While crontab typically schedules tasks based on specific time intervals, you can also execute jobs conditionally when certain conditions are met, such as when a file is created or when a process is running. This article demonstrates how to use crontab to execute jobs conditionally and automatically at system boot on Linux systems. Step 1: Identify the Condition The first step is to identify the condition that triggers ...
Read MoreHow to Configure PAM to Audit Logging Shell User Activity?
In today's digital age, security is of utmost importance. The rise of cyber threats and data breaches has shown that no system is completely safe. System administrators and IT professionals must take proactive measures to protect their systems and data. One such measure is the use of Pluggable Authentication Modules (PAM) for user authentication. PAM is a powerful tool that allows system administrators to customize the authentication process for their systems. It enables the use of multiple authentication methods, such as passwords, tokens, and biometrics, among others. This flexibility makes it easier for administrators to manage access controls and ...
Read MoreHow to invert a grep expression on Linux?
The grep command in Linux is used to filter searches in a file for a particular pattern of characters. It is one of the most used Linux utility commands to display the lines that contain the pattern that we are trying to search. To invert a grep expression means to display all lines that do NOT match the specified pattern, which is accomplished using the -v option. Basic Grep Syntax grep [options] pattern [files] Common Grep Options -c : Lists only a count of the lines that match a pattern -h : Displays ...
Read MoreWhat are the interrupt stages and processing?
The instruction cycle in a computer system consists of three main stages: fetch, execute, and interrupt handling. When an interrupt occurs during program execution, the CPU must temporarily suspend its current task to handle the interrupt request efficiently. Instruction Cycle with Interrupt Handling FETCH EXECUTE INTERRUPT Return to Fetch Interrupt? ...
Read MoreIntroduction to File MIME Types on Linux
MIME types (Multipurpose Internet Mail Extensions) are a crucial aspect of Linux file management, as they enable the operating system to identify file formats and determine the appropriate program for opening each file. Understanding MIME types is beneficial when dealing with various file formats on Linux systems, enhancing productivity and improving the overall user experience. What are MIME Types? MIME types are standardized identifiers that describe the nature and format of files. They consist of a type and subtype separated by a slash, such as text/plain or image/jpeg. Linux uses these identifiers to associate files with appropriate applications ...
Read MoreCPU Scheduling Criteria
CPU scheduling is the process of determining which process or task is to be executed by the central processing unit (CPU) at any given time. It is an important component of modern operating systems that allows multiple processes to run simultaneously on a single processor. The CPU scheduler determines the order and priority in which processes are executed and allocates CPU time accordingly, based on various criteria such as CPU utilization, throughput, turnaround time, waiting time, and response time. Efficient CPU scheduling is crucial for optimizing system performance and ensuring that processes are executed in a fair and timely manner. ...
Read MoreAlmaLinux 9.9 Released - Download DVD ISO Images
AlmaLinux is a free and open-source enterprise-level Linux distribution that serves as a community-driven alternative to Red Hat Enterprise Linux (RHEL). Originally created as a response to CentOS's shift in focus, AlmaLinux provides organizations with a stable, secure, and reliable operating system for production environments. The latest version, AlmaLinux 9.9, has been released with enhanced features and improved security measures. What is AlmaLinux? AlmaLinux is an enterprise-grade Linux distribution built from the same source code as Red Hat Enterprise Linux. This binary compatibility with RHEL makes it an ideal drop-in replacement for organizations seeking a cost-effective alternative. The ...
Read More10 Amazing Terminal Based Games for Linux Enthusiasts
If you're a Linux enthusiast looking for fun and challenging games, the world of terminal-based games offers a treasure trove of entertainment. While many gamers may overlook terminal gaming, these text-based adventures provide hours of engaging gameplay with minimal system resources and maximum creativity. This article explores some of the best terminal-based games for Linux enthusiasts, covering everything from classic dungeon crawlers to arcade-style games and text adventures. So grab your favorite beverage and dive into the fascinating world of terminal gaming. Classic Dungeon Crawlers Nethack Nethack is the quintessential roguelike game that has captivated players since ...
Read MoreMemory Allocation Techniques | Mapping Virtual Addresses to Physical Addresses
Memory allocation techniques are fundamental mechanisms in operating systems that manage how programs access and use system memory. The mapping of virtual addresses to physical addresses is a crucial aspect that allows multiple processes to run simultaneously while maintaining memory protection and efficient resource utilization. Virtual addresses provide programs with an abstraction layer over physical memory locations. Programs use virtual addresses to access memory, while the operating system translates these to actual physical addresses in RAM where data is stored. Methods of Virtual to Physical Address Mapping There are several established methods for mapping virtual addresses to ...
Read More