chris

Oracle Linux 8 — dotnet security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet security and bugfix update (ELSA-2021-0474)

🟠 High   ⏱ 15–60 min  Last verified: 9 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0474 Related CVEs: CVE-2021-1721 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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Common Problems 119030

Ubuntu 14.04 LTS MySQL Fails to Start After Unclean Shutdown

🟠 High   ⏱ 5–30 min  Last verified: 9 October 2020 Affected versions: 14.04 LTS 📖 ~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 118954

Ubuntu 14.04 LTS Kernel Panic After Unattended Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 9 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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Common Problems 118078

Ubuntu 18.04 LTS – AppArmor profile denial breaks custom application startup – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 October 2020 Affected versions: Ubuntu 18.04 LTS 📖 ~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 115124

firewalld Rich Rule Works in Runtime but Lost After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 9 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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How to Configure LVM on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure LVM on SLES 15

Introduction This tutorial covers How to Configure LVM on SLES 15 on SLES 15. SLES 15 (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. Step 1 — Install LVM zypper install -y lvm2 Step 2 — Create […]

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How to Configure Windows Server 2012 R2 with PowerShell — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Windows Server 2012 R2 with PowerShell

Introduction PowerShell 4.0, which ships with Windows Server 2012 R2, brings Desired State Configuration (DSC), enhanced debugging, and improved workflows to Windows administration. Performing initial configuration through PowerShell rather than the GUI creates repeatable, auditable, and scriptable setup procedures that work consistently across all servers. This guide covers every initial configuration task using PowerShell 4.0 […]

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