DNS

Common Problems 117051

Ubuntu 22.04 LTS – Docker bridge networking broken after nftables changes – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 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 […]

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Common Problems 112935

Windows Server 2016 – Credential Guard incompatibilities breaking apps – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 September 2023 Affected versions: Windows Server 2016 📖 ~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 Install Prometheus and Grafana on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Install Prometheus and Grafana on Oracle Linux 9

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 […]

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How to Set Up Ansible on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Ansible on Debian 12

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 […]

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How to Configure Kubernetes RBAC on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Kubernetes RBAC on Oracle Linux 9

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 […]

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Common Problems 119971

Debian 12 – dpkg Interrupted State Blocks Package Operations – Full Recovery

🔴 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 & […]

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Ubuntu 22.04 — maradns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — maradns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 September 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6271-1 Related CVEs: CVE-2022-30256 CVE-2023-31137 Upstream summary: Xiang Li discovered that MaraDNS incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted […]

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Common Problems 116933

Ubuntu 22.04 LTS – netplan changes do not apply after interface edits – Fix & Prevention

🟠 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 […]

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How to Configure Container Networking with CNI Plugins on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure Container Networking with CNI Plugins on Debian 12

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 […]

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How to Set Up VLAN Tagging on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up VLAN Tagging on Debian 12

Introduction This guide explains how to Set Up VLAN Tagging 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 with the […]

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