Troubleshooting

Common Problems 117417

Ubuntu 20.04 APT Lock File Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 24 October 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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Arch Linux — gdm — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — gdm — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202011-5 Related CVEs: CVE-2020-16125 CVE-2019-3825 CVE-2019-3820 Upstream summary: Type: privilege escalation. Status: Fixed. Affected: 3.38.1-3. Fixed in: 3.38.2-1. Group: AVG-1264. Table of contents Symptom & Impact Environment & Reproduction Root […]

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FreeBSD 12 — awstats — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — awstats — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 October 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: www/awstats — Partial absolute pathname Related CVEs: CVE-2005-0116 CVE-2005-0362 CVE-2005-0363 CVE-2005-0435 CVE-2005-0436 CVE-2005-0437 CVE-2005-0438 CVE-2005-1527  +5 more Upstream summary: MITRE reports: It seems #90 is not completely fixed in 7.8. […]

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Common Problems 113014

Windows Server 2016 — AD trust password broken between domains causing cross-domain auth failures — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 October 2020 Affected versions: Windows Server 2016 📖 ~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 Errors […]

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How to Configure MySQL Replication on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure MySQL Replication on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure MySQL Replication 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 the default […]

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Common Problems 112467

Windows Server 2019 – Display miniport TDR resets freeze RDP sessions – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 24 October 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 Install MongoDB on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install MongoDB on FreeBSD 12

Introduction How to Install MongoDB on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, and […]

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SLES 12 — ipmitool — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — ipmitool — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 October 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:0405-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-5208 Upstream summary: It's been found that multiple functions in ipmitool before 1.8.19 neglect proper checking of the data received from a remote LAN party, […]

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Oracle Linux 8 — libdb — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libdb — vulnerability — patch and remediation guide (ELSA-2021-1675)

🟢 Low   ⏱ 5–15 min  Last verified: 24 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1675 Related CVEs: CVE-2019-2708 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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How to Configure Group Policy Security Filtering on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Group Policy Security Filtering on Windows Server 2016

How to Configure Windows Server 2016 Group Policy Security Filtering Group Policy Security Filtering lets you control precisely which users and computers receive the settings in a GPO, without needing separate OUs for each subset. By modifying the Access Control List (ACL) of a GPO, you can grant or deny the Apply Group Policy permission […]

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