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Ubuntu 26.04 LTS DKMS Module Build Fails After Kernel Update

🔴 Critical   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 26.04 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 […]

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How to Configure rkhunter Rootkit Scanner on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure rkhunter Rootkit Scanner on FreeBSD 15

Introduction Deploying configure rkhunter rootkit scanner on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports […]

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Amazon Linux 2023 — valkey — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — valkey — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1471 Related CVEs: CVE-2025-67733 CVE-2026-21863 CVE-2025-46817 CVE-2025-46818 CVE-2025-46819 CVE-2025-49844 CVE-2025-32023 CVE-2025-48367  +2 more Upstream summary: Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a […]

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How to Configure Static File Serving with Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Static File Serving with Nginx on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure static file serving with nginx both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Static File Serving with Nginx on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Configure Nginx Server Blocks (Virtual Hosts) on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Secure Apache with Let’s Encrypt SSL on Ubuntu 26.04

Free SSL certificates from Let’s Encrypt, managed by Certbot’s Apache plugin, give your Apache-hosted domains HTTPS encryption with minimal configuration and fully automatic renewals. This guide covers the complete process on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server with Apache installed A registered domain name pointing to […]

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