Security Hardening

Ubuntu 18.04 — open-iscsi — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — open-iscsi — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 March 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6259-1 Related CVEs: CVE-2020-13987 CVE-2020-13988 CVE-2020-17437 Upstream summary: Jos Wetzels, Stanislav Dashevskyi, and Amine Amri discovered that Open-iSCSI incorrectly handled certain checksums for IP packets. An attacker could possibly use […]

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How to Set Up Event Log Forwarding on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up Event Log Forwarding on Windows Server 2016

How to Set Up Windows Server 2016 Event Log Forwarding Windows Event Log Forwarding (WEF) allows you to collect event logs from multiple Windows computers and consolidate them on a central collector server. This is critical for centralized security monitoring, compliance, and SIEM integration without deploying agent software. WEF uses the Windows Remote Management (WinRM) […]

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Oracle Linux 8 — gcc-toolset-11-annobin — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — gcc-toolset-11-annobin — vulnerability — patch and remediation guide (ELSA-2021-4591)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4591 Related CVEs: CVE-2021-42574 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 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2023-3349)

🟠 High   ⏱ 15–60 min  Last verified: 23 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-3349 Related CVEs: CVE-2023-32233 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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Alpine Linux edge — mrxvt — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.5.4-r9 📖 ~4 min read  •  Source: Alpine secdb entry — mrxvt 0.5.4-r9 Related CVEs: CVE-2021-33477 Upstream summary: Alpine community repository for vedge ships mrxvt 0.5.4-r9 which addresses CVE-2021-33477. Table of contents Symptom & Impact Environment […]

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Common Problems 117478

Ubuntu 20.04 LTS – system fails to boot after kernel update

🔴 Critical   ⏱ 5–30 min  Last verified: 23 March 2021 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 112435

Windows Server 2019 — MSU update package fails to install with hash mismatch corrupt error — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 March 2021 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 Set Up a Kubernetes Dashboard on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Kubernetes Dashboard on Oracle Linux 8

Introduction This tutorial demonstrates how to Set Up a Kubernetes Dashboard on Oracle Linux 8 on Oracle Linux 8. 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 Oracle Linux 8 system with […]

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How to Install MySQL via AIX Toolbox on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Install MySQL via AIX Toolbox on IBM AIX 7.1

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 install mysql via aix toolbox on ibm aix 7.1 […]

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