Logging Monitoring

Rocky Linux 8 — python-dns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — python-dns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2023:5994 Related CVEs: CVE-2023-40217 CVE-2023-32681 Upstream summary: Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages […]

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Oracle Linux 9 — haproxy — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — haproxy — vulnerability — patch and remediation guide (ELSA-2024-1142)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-1142 Related CVEs: CVE-2023-40225 CVE-2023-45539 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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Amazon Linux 2 — thunderbird — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — thunderbird — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1804 Related CVEs: CVE-2022-1529 CVE-2022-1802 CVE-2020-16044 CVE-2020-15673 CVE-2020-15676 CVE-2020-15677 CVE-2020-15678 CVE-2020-15683  +12 more Upstream summary: The Mozilla Foundation Security Advisory describes this flaw as: An attacker could have sent a […]

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How to Set Up Windows Server 2022 Environment Variables — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up Windows Server 2022 Environment Variables

Why Monitor Hyper-V with Performance Counters? Performance counters are the foundation of Hyper-V health monitoring on Windows Server 2022. They expose real-time and historical metrics for every layer of the virtualisation stack: hypervisor scheduling, virtual processor utilisation, memory pressure, virtual storage I/O, and virtual network throughput. Without monitoring these counters, capacity planning is guesswork and […]

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Oracle Linux 9 — java-17-openjdk security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — java-17-openjdk security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-5736)

🟠 High   ⏱ 15–60 min  Last verified: 23 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5736 Related CVEs: CVE-2022-34169 CVE-2022-21541 CVE-2022-21549 CVE-2022-21540 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Common Problems 117911

Ubuntu 18.04 APT Lock File Error During Package Install

🟡 Medium   ⏱ 5–30 min  Last verified: 23 February 2023 📖 ~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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Amazon Linux 2 — resteasy-base — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — resteasy-base — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2024-2398 Related CVEs: CVE-2021-20289 CVE-2023-0482 Upstream summary: A flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final. The endpoint class and method names are returned as […]

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Common Problems 113455

Windows Server 2012 R2 — PXE clients fail to obtain boot options from DHCP policy classes on Server 2019 — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 23 February 2023 Affected versions: Windows Server 2012 R2 📖 ~2 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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How to Set Up Magento on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Set Up Magento on Oracle Linux 9

Introduction This tutorial demonstrates how to Set Up Magento on Oracle Linux 9 on Oracle Linux 9. 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 9 system with the default […]

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Common Problems 111875

Windows Server 2022 Firewall Blocks WinRM and Remote Management Ports – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 February 2023 Affected versions: Windows Server 2022 📖 ~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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