Linux

YUM – Package managers are essential tools in every Linux distribution. They simplify the process of installing, updating, configuring, and removing software packages from a system. Instead of manually downloading and compiling source code, package managers automate dependency resolution and ensure software integrity through trusted repositories. There are two major types of package formats in

Now since we have already studied about Linux Firewall using IPtables, let’s dive into another commonly used firewall i.e., UFW Firewall also called as Uncomplicated Firewall. Table of Contents 1. Introduction to UFW Firewall UFW (Uncomplicated Firewall) is a simplified frontend for managing IPTables on Linux systems. It was developed by Canonical to make firewall

Table of Contents 1. Introduction to Firewalls Firewalls are security systems that monitor and control network traffic based on predetermined rules. They act as a barrier between trusted internal networks and untrusted external ones (like the internet). There are two major types: 2. What is IPTables? IPTables is a user-space utility program that allows a

Before jumping into Hardening and Securing OpenSSH, we must first understand what are the benefits as well as the consequences in case the OpenSSH server is not hardened. OpenSSH is the default gateway into most Unix-based systems, used by system administrators, developers, and automation tools to remotely access and control machines. While OpenSSH itself is

OpenSSH (Open Secure Shell) is a suite of secure networking utilities based on the Secure Shell (SSH) protocol. It provides encrypted communication sessions over a computer network using the client-server model. OpenSSH is an essential tool in the toolbox of system administrators and developers, allowing for secure remote login, secure file transfers, and port forwarding

Disk partitioning is the process of dividing a storage device into separate, logical sections (partitions) so they can be formatted and used efficiently. Linux provides several tools for this, with fdisk, parted, and partprobe being among the most commonly used. What is Disk Partitioning? Disk partitioning is essential when: A typical hard disk can have:

Managing storage efficiently is a crucial part of system administration. In Linux, file compression, archiving, and backup are three distinct yet often overlapping concepts. This guide will walk you through each with practical commands and examples. What’s the Difference? Concept Description Compression Reduces file size using algorithms (e.g., gzip, bzip2) Archiving Combines multiple files into

We all know that starting any machine typically begins with pressing a power button. However, that’s just the beginning—especially for machines running an operating system. After powering on, these systems go through several stages before becoming fully operational and ready to perform tasks. The Linux boot process is a structured, multi-stage procedure that initializes hardware

Linux follows the Filesystem Hierarchy Standard (FHS) that organizes files in a tree-like structure. Each directory and file has a specific role in the system. Here’s a breakdown of the most important ones: / (Root Directory) /bin – Essential User Binaries /sbin – System Binaries /etc – Configuration Files /home – User Home Directories /root