chris

Arch Linux — tomcat9 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — tomcat9 — multiple vulnerabilities (2 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-202006-7 Related CVEs: CVE-2020-9484 CVE-2020-17527 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 9.0.31-1. Fixed in: 9.0.35-1. Group: AVG-1171. Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Configure Windows Server 2019 Group Policy Troubleshooting — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Group Policy Troubleshooting

How to Configure Windows Server 2019 Group Policy Troubleshooting Group Policy troubleshooting is one of the most common tasks for Windows Server administrators. GPO issues can manifest as settings not applying, inconsistent behavior between users or computers, slow logon times, or unexpected policy applications. Windows Server 2019 provides a comprehensive set of tools for diagnosing […]

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Oracle Linux 8 — ruby:3.3 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ruby:3.3 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2024-3670)

🟡 Medium   ⏱ 10–30 min  Last verified: 11 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-3670 Related CVEs: CVE-2024-27281 CVE-2024-27280 CVE-2024-27282 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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AlmaLinux 8 — infiniband-diags — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — infiniband-diags — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2019:3585 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Common Problems 119067

NTP Time Drift Causes Authentication and TLS Failures on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 11 July 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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Common Problems 119023

Ubuntu 14.04 LTS SSL certificate verify failed in package tools

🟡 Medium   ⏱ 5–30 min  Last verified: 11 July 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 Schedule Tasks with Cron on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Schedule Tasks with Cron on SLES 12

Introduction This tutorial covers How to Schedule Tasks with Cron on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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How to Use cfgmgr to Configure New Devices on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use cfgmgr to Configure New Devices on IBM AIX 7.1

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 use cfgmgr to configure new devices on ibm aix […]

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AlmaLinux 8 — kmod — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — kmod — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2060 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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