Troubleshooting

Oracle Linux 8 — nodejs:14 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-0050)

• March 7, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 7 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0050 Related CVEs: CVE-2021-44906 CVE-2022-0235 CVE-2022-3517 CVE-2022-43548 CVE-2022-24999 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Gentoo Linux — net-ftp/pure-ftpd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

• March 7, 2021
• Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202003-54 Related CVEs: CVE-2020-9274 CVE-2020-9365 Upstream summary: Multiple vulnerabilities have been discovered in Pure-FTPd. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & Reproduction […]

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How to Monitor System Resources on Oracle Linux 8

• March 7, 2021
• Oracle Linux
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Introduction Setting up monitor system resources on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Monitor System Resources on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Ubuntu 16.04 Wi-Fi disconnects or fails to reconnect

• March 7, 2021
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 7 March 2021 📖 ~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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How to Configure Kerberos Authentication on IBM AIX 7.1

• March 7, 2021
• 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 kerberos authentication on ibm aix 7.1 on IBM […]

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How to Configure VM Disk Types (VHD and VHDX) on Windows Server 2012 R2

• March 7, 2021
• Tutorials
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How to Configure VM Disk Types (VHD and VHDX) on Windows Server 2012 R2 Virtual hard disk configuration is foundational to Hyper-V performance and reliability. Windows Server 2012 R2 supports two virtual disk formats — the legacy VHD and the modern VHDX — each with their own characteristics, size limits, and operational considerations. Choosing the […]

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Amazon Linux 2 — dcraw — vulnerability — patch and remediation guide

• March 7, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2025-3017 Related CVEs: CVE-2021-3624 Upstream summary: There is an integer overflow vulnerability in dcraw. When the victim runs dcraw with a maliciously crafted X3F input image, arbitrary code may be […]

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Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2022-9013)

• March 7, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 7 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9013 Related CVEs: CVE-2021-4155 CVE-2021-0920 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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How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2

• March 7, 2021
• Tutorials
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How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2 Windows Event Forwarding (WEF) is a native Windows mechanism that allows you to centralize security events from dozens or hundreds of servers onto a dedicated collector server—without deploying an agent or purchasing additional software. WEF uses the WS-Management protocol (the same protocol […]

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Arch Linux — jupyterlab — vulnerability — patch and remediation guide

• March 7, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202108-10 Related CVEs: CVE-2021-32797 Upstream summary: Type: cross-site scripting. Status: Fixed. Affected: 3.1.2-1. Fixed in: 3.1.4-1. Group: AVG-2266. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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