Common Problems

Oracle Linux 8 — Kernel Issues — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Kernel Issues (8-KERNEL-ISSUES)

🟠 High   ⏱ 5–30 min  Last verified: 3 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: Oracle Bug OLRNB-ol8-issues-kernel 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 […]

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Common Problems 118513

Ubuntu 16.04 LTS – failed package configuration leaves dpkg in broken state – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 October 2020 Affected versions: Ubuntu 16.04 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 118442

Ubuntu 16.04 Unattended Upgrades Keeps dpkg Busy

🟡 Medium   ⏱ 5–30 min  Last verified: 3 October 2020 📖 ~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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Common Problems 115608

RHEL 7 service postfix Queue Grows Due to DNS Failure

🟡 Medium   ⏱ 5–30 min  Last verified: 3 October 2020 📖 ~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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Arch Linux — okular — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — okular — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202003-10 Related CVEs: CVE-2020-9359 Upstream summary: Type: arbitrary command execution. Status: Fixed. Affected: 19.12.3-2. Fixed in: 19.12.3-3. Group: AVG-1113. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Oracle Linux 8 — lua — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — lua — vulnerability — patch and remediation guide (ELSA-2021-4510)

🟢 Low   ⏱ 5–15 min  Last verified: 3 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4510 Related CVEs: CVE-2020-24370 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 8 — keepalived — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — keepalived — security and stability fixes — required update (ELSA-2022-1930)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1930 Related CVEs: CVE-2021-44225 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Debian 10 — e2fsprogs — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — e2fsprogs — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 2 October 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-5094 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 119114

Ubuntu 14.04 LTS PAM Authentication Failures for Local Users

🟡 Medium   ⏱ 5–30 min  Last verified: 2 October 2020 📖 ~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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Common Problems 117913

Ubuntu 18.04 LTS DNS resolution fails intermittently with systemd-resolved

🟡 Medium   ⏱ 5–30 min  Last verified: 2 October 2020 📖 ~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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