Troubleshooting

How to Configure a Group Policy Central Store on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure a Group Policy Central Store on Windows Server 2016

How to Set Up Windows Server 2016 Group Policy Central Store The Group Policy Central Store is a centralised repository for Administrative Template files (ADMX and ADML) stored in the SYSVOL of the domain controller. Without a Central Store, each administrator’s workstation loads ADMX files from its local PolicyDefinitions folder, which can lead to inconsistencies […]

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Common Problems 120993

Debian 10: systemd unit enters start-limit-hit

🟠 High   ⏱ 5–30 min  Last verified: 24 May 2020 Affected versions: Debian 10 📖 ~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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Common Problems 119119

Ubuntu 14.04 LTS NVIDIA Driver Causes Black Screen After Login

🟡 Medium   ⏱ 5–30 min  Last verified: 24 May 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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How to Install and Configure Varnish Cache on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on Debian 10

Introduction Deploying install and configure varnish cache on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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Arch Linux — perl-xml-libxml — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — perl-xml-libxml — vulnerability — 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-201801-15 Related CVEs: CVE-2017-10672 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.0129-1. Fixed in: 2.0130-1. Group: AVG-501. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Common Problems 112408

Windows Server 2019 — Servicing Stack Update Missing Blocks Monthly LCU Install — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 May 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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FreeBSD 12 — openhab-addons — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openhab-addons — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 May 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: OpenHAB CometVisu addon — Multiple vulnerabilities Upstream summary: OpenHAB reports: This patch release addresses the following security advisories: SSRF/XSS (CometVisu) – GHSA-v7gr-mqpj-wwh3 Sensitive information disclosure (CometVisu) – GHSA-3g4c-hjhr-73rj RCE through […]

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FreeBSD 12 — mkvtoolnix — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — mkvtoolnix — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 May 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mkvtoolnix — code execution via specially crafted files Upstream summary: Moritz Bunkus reports: most of the bugs fixed on 2016-09-06 and 2016-09-07 for issue #1780 are potentially exploitable. The scenario […]

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FreeBSD 12 — openjdk7-jre — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openjdk7-jre — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 May 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: java — multiple vulnerabilities Related CVEs: CVE-2015-4734 CVE-2015-4803 CVE-2015-4805 CVE-2015-4806 CVE-2015-4810 CVE-2015-4835 CVE-2015-4840 CVE-2015-4842  +12 more Upstream summary: Oracle reports: This Critical Patch Update contains 25 new security fixes for […]

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FreeBSD 12 — py310-Flask-Cors — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py310-Flask-Cors — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 May 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-Flask-Cors — directory traversal vulnerability Related CVEs: CVE-2020-25032 Upstream summary: praetorian-colby-morgan reports: An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal […]

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