June 2021 - Page 66 of 66

Common Problems 113049

Windows Server 2016 – Failover cluster groups flap due to aggressive failback settings – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 May 2026 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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How to Configure Storage Spaces on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Storage Spaces on Windows Server 2012 R2

How to Configure Storage Spaces on Windows Server 2012 R2 Storage Spaces is a software-defined storage technology introduced with Windows Server 2012 and significantly enhanced in Windows Server 2012 R2. It allows administrators to group physical disk drives of varying types and sizes into a storage pool, then carve virtual disks — called storage spaces […]

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Debian 10 — xrdp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — xrdp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-4044 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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Ubuntu 18.04 — libgd2 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libgd2 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7112-1 Related CVEs: CVE-2021-40812 CVE-2017-6363 CVE-2021-38115 CVE-2021-40145 CVE-2018-14553 CVE-2019-11038 CVE-2019-6977 CVE-2019-6978  +2 more Upstream summary: It was discovered that the GD Graphics Library did not perform proper bounds checking while […]

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SLES 12 — libexempi3 — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libexempi3 — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2023:3734-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-18651 CVE-2017-18234 CVE-2017-18233 CVE-2017-18236 CVE-2017-18238 CVE-2018-7728 CVE-2018-7730 Upstream summary: Buffer Overflow vulnerability in function ID3_Support::ID3v2Frame::getFrameValue in exempi 2.5.0 and earlier allows remote attackers to cause […]

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SLES 12 — python-PyYAML — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — python-PyYAML — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:197-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14343 Upstream summary: A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it […]

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Debian 10 — ntfs-3g — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — ntfs-3g — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-33285 CVE-2021-46790 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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Ultimate Guide: Understanding Relational Databases – Model, History & SQL 2025–2026

Ultimate Guide: Understanding Relational Databases – Model, History & SQL 2025–2026

Understanding relational databases is one of the most essential skills for developers, data engineers, backend architects, full-stack builders, DevOps professionals, data analysts, startup founders, and business leaders working with data-driven applications in 2025–2026. Relational databases (RDBMS) remain the dominant way to store, organize, query, and manage structured data — powering e-commerce platforms, SaaS products, CRMs, financial systems, inventory management, user authentication, analytics dashboards, and almost every serious backend system.

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