Ansible is an open-source IT automation tool developed by Red Hat that allows managing server configuration, application deployment, and task automation using human-readable YAML playbooks. Unlike Chef or Puppet (which require agents installed on managed nodes), Ansible is agentless — it connects to managed servers via SSH and executes tasks using Python, with no permanent […]
Introduction This tutorial demonstrates how to Configure DHCP Server with dhcpd on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream […]
🔴 Critical ⏱ 5–30 min Last verified: 21 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 […]
🟠 High ⏱ 5–30 min Last verified: 21 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 […]
🟢 Low ⏱ 5–15 min Last verified: 21 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7363-1 Related CVEs: CVE-2025-24032 CVE-2025-24531 Upstream summary: Marcus Rückert and Matthias Gerstner discovered that PAM-PKCS#11 did not properly handle certain return codes when authentication was not possible. An attacker could […]
Introduction Setting up install ruby with rbenv on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Ruby with rbenv on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and how to […]
🟡 Medium ⏱ 5–30 min Last verified: 20 May 2026 Affected versions: 26.04 📖 ~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 & Cross-Refs […]
Symfony 7 is a robust PHP framework following an LTS release cycle. Known for its reusable components and strict standards, Symfony powers enterprise applications worldwide. This guide installs a Symfony 7 application on Ubuntu 26.04 LTS with Nginx and PHP-FPM. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with Nginx and PHP […]
🟠 High ⏱ 5–30 min Last verified: 20 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 […]
Xdebug is an indispensable PHP debugging and profiling extension. Xdebug 3 works with PHP 8.4 and integrates seamlessly with VS Code, PhpStorm, and other IDEs for step-through debugging, stack traces, and code coverage. This guide installs and configures Xdebug 3 on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS […]
