Introduction How to Install Prometheus and Grafana on Oracle Linux 9 on Oracle Linux 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]
LUKS (Linux Unified Key Setup) is the standard disk encryption framework on Linux, providing transparent block-level encryption that protects data at rest even if physical media is stolen. On RHEL 9, LUKS is backed by the cryptsetup tool and integrates tightly with the kernel’s device mapper subsystem. This tutorial walks through encrypting a new disk […]
Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up set up ansible on debian 12 on Bookworm leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bookworm freeze. Follow each step carefully and the […]
Introduction Setting up install github actions runner on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install GitHub Actions Runner on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to […]
Introduction How to Configure Kubernetes RBAC on Oracle Linux 9 on Oracle Linux 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]
🔴 Critical ⏱ 5–30 min Last verified: 12 September 2023 Affected versions: Debian 12 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]
Port knocking is a security technique that hides your SSH port from network scanners by keeping it firewalled until a specific sequence of connection attempts is made. On RHEL 9, combining knockd with nftables lets you expose SSH only to clients who know the secret knock sequence, dramatically reducing brute-force exposure. This tutorial walks through […]
🟠 High ⏱ 5–30 min Last verified: 12 September 2023 Affected versions: Ubuntu 22.04 LTS 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]
Introduction This guide explains how to Configure Container Networking with CNI Plugins on Debian 12 on Debian 12 Bookworm. Debian Bookworm uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 12 install […]
Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure bgp routing with frrouting on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure BGP Routing with FRRouting on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the […]
