Troubleshooting

Amazon Linux 2 — kernel-livepatch-4.14.171-136.231 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

• August 5, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2020-011 Related CVEs: CVE-2020-12657 CVE-2020-10711 CVE-2020-10942 CVE-2020-8648 Upstream summary: An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.(CVE-2020-12657) Table of […]

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Debian 10 — zlib — vulnerability — patch and remediation guide

• August 5, 2020
• Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 5 August 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-25032 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 Hostname Resolution Warning sudo unable to resolve host

• August 4, 2020
• Linux
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🟢 Low   ⏱ 5–30 min  Last verified: 4 August 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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Ubuntu 16.04 LTS /var partition full causing service failures

• August 4, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 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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Ubuntu 20.04 LTS Port Conflict Prevents Daemon Binding

• August 4, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 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 2019 – VMMQ packet reordering from NIC driver regression – Fix and Prevention

• August 4, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 2020 Affected versions: Windows Server 2019 📖 ~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 2019 — Cumulative Update Fails with 0x800f0922 After Reboot — Fix & Prevention

• August 4, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 4 August 2020 Affected versions: Windows Server 2019 📖 ~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 FIPS 140-2 Mode on SLES 12

• August 4, 2020
• SUSE Linux Enterprise
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Introduction This tutorial covers How to Configure FIPS 140-2 Mode on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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How to Configure IBM DS8000 Storage on IBM AIX 7.1

• August 4, 2020
• IBM AIX
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Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ibm ds8000 storage on ibm aix 7.1 on […]

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Oracle Linux 8 — kernel — vulnerability — patch and remediation guide (ELSA-2019-2411)

• August 4, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 4 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2411 Related CVEs: CVE-2019-1125 CVE-2019-13272 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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