Author name: SysAdmin Sage

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