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Deploying a Hardened OpenVPN Server in an LXC Container: A Step-by-Step Guide
This guide walks you through the process of deploying a hardened OpenVPN server inside a TurnKey LXC container on a Proxmox host. The setup ensures secure access to a personal VPN endpoint using UDP on port 1194, with firewall protections and automated client generation. Prerequisites Step 1: Prepare the Proxmox Host Enable TUN/TAP in the…
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Configure a TFTP Server Using Dnsmasq on Fedora
TFTP (Trivial File Transfer Protocol) is a lightweight file transfer protocol widely used in scenarios requiring minimal protocol overhead. Unlike more complex protocols like FTP or HTTP, TFTP is designed for simple, fast file transfers, often in environments where low resource usage and quick deployment are critical. In this guide, we’ll explore how to set…
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How to Install OpenWrt on a TP-Link MR6400 Router: A Step-by-Step Guide
OpenWrt is an open-source Linux-based operating system designed for routers and network devices. It offers advanced customization, enhanced security, and additional features that surpass the capabilities of factory firmware. This tutorial walks you through installing OpenWrt on the TP-Link MR6400 router, configuring it for cellular connectivity, and troubleshooting common issues. Introduction to OpenWrt What is…
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Guide to Configuring PAM in Linux: Best Practices for Security
Pluggable Authentication Modules (PAM) is a powerful framework in Linux that provides a centralized and flexible mechanism for authentication, session management, and password policies. Proper configuration of PAM is essential for securing your system while maintaining flexibility to support various authentication methods. This article will walk you through the essentials of PAM, how it works,…
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How to Enable and Configure RPM Repositories
Managing software repositories is a critical task for system administrators working with Red Hat-based Linux distributions like Rocky Linux, Fedora, and RHEL. In this tutorial, we’ll explore how to enable and configure RPM repositories, both manually and using the dnf config-manager tool. We’ll also discuss how to clean up and remove repositories when they are…
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Managing Software Packages with DNF
The DNF (Dandified Yum) package manager is a powerful tool for managing software on Red Hat-based Linux distributions such as Rocky Linux, Fedora, and Red Hat Enterprise Linux (RHEL). In this post, we’ll explore how to download, install, update, and manage software packages using DNF, as well as how to enable and disable repositories and…
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Understanding and Managing SELinux in Linux
Security-Enhanced Linux (SELinux) is a powerful security module integrated into the Linux kernel, designed to provide a mechanism for supporting access control security policies. This post will explore the various aspects of SELinux, including how to change its enforcement mode, control file contexts, adjust policies using Booleans, and troubleshoot SELinux-related issues. By the end, you’ll…
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Manage Users, Groups and Passwords in Linux
Managing users and groups is a fundamental aspect of system administration in Linux, ensuring that access control and permissions are properly maintained. This article will cover the essential concepts of users and groups, gaining superuser access, managing local user accounts, managing local group accounts, and managing user passwords. We will also touch upon password hashing…
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Red Hat: Becoming a System Administrator and Certified Engineer
Embarking on to becoming a certified Red Hat System Administrator (RHCSA) and Red Hat System Engineer (RHCE) is a very recommendable decision for any IT professional. These certifications not only validate your skills but also open doors to numerous career opportunities. This article serves as an introduction to a series of guides that will help…
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Understanding File System Permissions in Linux
File system permissions in Linux are crucial for maintaining security and proper functionality. This article will delve into the basics of file permissions, explaining how to operate them using both symbolic and numeric methods. Additionally, we will cover special permissions such as setuid, setgid, and the sticky bit, and discuss the default umask settings. Basic…
