Troubleshooting

Common Problems 115577

systemctl Restart Hangs Because Dependency Is Deadlocked

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5997-1 Related CVEs: CVE-2020-5208 Upstream summary: It was discovered that IPMItool was not properly checking the data received from a remote LAN party. A remote attacker could possibly use this […]

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Common Problems 115527

firewalld Zone Misassignment Breaks App Reachability

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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Common Problems 113583

Windows Server 2012 R2 — SMB access fails because NetBIOS name resolution is broken — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 2021 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 March 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3259-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14001 Upstream summary: The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such […]

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How to Configure IBM PowerHA SystemMirror on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure IBM PowerHA SystemMirror on IBM AIX 7.2

Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ibm powerha systemmirror on ibm aix 7.2 on […]

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SLES 15 — python3-Flask-Security-Too — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python3-Flask-Security-Too — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 March 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3093-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-21241 CVE-2021-23385 Upstream summary: The Python "Flask-Security-Too" package is used for adding security features to your Flask application. It is an is a independently maintained […]

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How to Monitor Power System Hardware Faults on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Monitor Power System Hardware Faults on IBM AIX 7.2

Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to monitor power system hardware faults on ibm aix 7.2 […]

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How to Configure Active Directory Federation Services on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Active Directory Federation Services on Windows Server 2016

How to Set Up Windows Server 2016 Active Directory Federation Services Active Directory Federation Services (AD FS) is a Microsoft identity solution that provides single sign-on (SSO) and claims-based authentication across organizational boundaries. It enables users to authenticate once with their corporate credentials and access applications hosted in other organizations, cloud services like Microsoft 365, […]

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