DNS

Common Problems 117452

Ubuntu 20.04 LTS – cloud-init network overrides break static IP settings – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 21 November 2023 Affected versions: Ubuntu 20.04 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 Install and Configure Cassandra on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install and Configure Cassandra on Debian 12

Introduction This guide explains how to Install and Configure Cassandra 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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Common Problems 117109

Ubuntu 22.04 LTS – multipath or duplicate UUID causes slow boot waits

🟡 Medium   ⏱ 5–30 min  Last verified: 21 November 2023 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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 […]

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Common Problems 115631

RHEL 7 yum Fails Due To Expired Repository TLS Certificate

🟠 High   ⏱ 5–30 min  Last verified: 21 November 2023 Affected versions: RHEL 7 📖 ~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 Set Up MariaDB Replication on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up MariaDB Replication on Debian 12

Introduction How to Set Up MariaDB Replication on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. […]

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Common Problems 120016

Debian 12 Interface Rename Breaks Static Network Configuration

🟠 High   ⏱ 5–30 min  Last verified: 20 November 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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How to Set Up IPv6 on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up IPv6 on Debian 12

Introduction This guide explains how to Set Up IPv6 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 standard […]

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Gentoo Linux — net-dns/dnsmasq — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-dns/dnsmasq — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202412-10 Related CVEs: CVE-2022-0934 CVE-2023-28450 CVE-2023-50387 CVE-2023-50868 CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684  +4 more Upstream summary: Multiple vulnerabilities have been discovered in Dnsmasq. Please review the CVE identifiers referenced below for details. Table […]

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Common Problems 117062

Ubuntu 22.04 GRUB menu missing after update

🟡 Medium   ⏱ 5–30 min  Last verified: 20 November 2023 📖 ~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 References & Further […]

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How to Configure journald Log Persistence on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure journald Log Persistence on Debian 12

Introduction Deploying configure journald log persistence on debian 12 on a Debian 12 Bookworm machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before you […]

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