Common Problems

RHEL 8 cockpit web console unreachable after certificate update

• October 5, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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firewalld Rule Added but Port Still Closed

• October 5, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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Windows Server 2012 R2 — Cumulative update fails because required Servicing Stack Update is missing — Fix & Prevention

• October 5, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 5 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Windows Server 2016 – Group Policy denied due to filtering or WMI scope errors – Fix & Prevention

• October 5, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 5 October 2020 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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Windows Server 2012 R2 — DISM RestoreHealth fails because component store is corrupt and unrepairable — Fix & Prevention

• October 5, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 5 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Oracle Linux 8 — curl — security and stability fixes — required update (ELSA-2020-4599)

• October 4, 2020
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 4 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4599 Related CVEs: CVE-2020-8177 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 9 – resolv.conf Keeps Reverting and DNS Fails – Resolver Control

• October 4, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 4 October 2020 Affected versions: Debian 9 📖 ~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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Kernel Panic After Dist-upgrade

• October 4, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 4 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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SLES 15 — xtrans — vulnerability — patch and remediation guide

• October 4, 2020
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 4 October 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2023:3189-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25697 Upstream summary: A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an […]

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Alpine Linux edge — axel — vulnerability — patch and remediation guide

• October 4, 2020
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.17.8-r0 📖 ~4 min read  •  Source: Alpine secdb entry — axel 2.17.8-r0 Related CVEs: CVE-2020-13614 Upstream summary: Alpine main repository for vedge ships axel 2.17.8-r0 which addresses CVE-2020-13614. Table of contents Symptom & Impact Environment […]

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