Linux

Common Problems 127211

CentOS Stream 10 – Common Problem 225 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 29 October 2025 Affected versions: CentOS Stream 10 📖 ~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 124036

Oracle Linux 10 – nftables backend conflicts with legacy iptables tooling – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 29 October 2025 Affected versions: Oracle Linux 10 📖 ~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 124014

Oracle Linux 10 – dnf cannot download metadata due to mirror TLS validation errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 October 2025 Affected versions: Oracle Linux 10 📖 ~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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AlmaLinux 9 — varnish — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — varnish — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:8337 Related CVEs: CVE-2025-47905 CVE-2024-30156 CVE-2023-44487 CVE-2022-45060 Upstream summary: Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web […]

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How to Set Up HTTP/2 in Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Set Up HTTP/2 in Nginx on RHEL 10

Introduction This tutorial demonstrates how to Set Up HTTP/2 in Nginx 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 […]

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AlmaLinux 8 — perl-CPAN-Meta — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — perl-CPAN-Meta — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:8096 Related CVEs: CVE-2025-40909 CVE-2023-47038 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have a […]

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Debian 13 — libntlm — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libntlm — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 October 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-17455 Upstream summary: Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in […]

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Common Problems 119614

Debian 13 – LVM thin pool reaches 100% and blocks writes

🔴 Critical   ⏱ 5–30 min  Last verified: 29 October 2025 Affected versions: Debian 13 Debian 13 (Trixie) Debian 13.x 📖 ~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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Debian 13 — gi-docgen — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — gi-docgen — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 October 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-11687 Upstream summary: A flaw was found in the gi-docgen. This vulnerability allows arbitrary JavaScript execution in the context of the page — enabling DOM access, session cookie theft […]

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Common Problems 119579

Debian 13 AppArmor Denies NGINX Access to Required Paths

🟡 Medium   ⏱ 5–30 min  Last verified: 29 October 2025 📖 ~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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