Logging Monitoring

Common Problems 118485

Clock Drift and NTP Sync Problems on Ubuntu 16.04

🟡 Medium   ⏱ 5–30 min  Last verified: 20 September 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 118133

Ubuntu 18.04 LTS – DKMS module build fails after kernel update and drivers stop loading – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 September 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 118038

Ubuntu 18.04 LTS – kernel update leaves system stuck on old version – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 20 September 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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How to Set Up Snort IDS on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Snort IDS on Oracle Linux 8

Introduction How to Set Up Snort IDS on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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Common Problems 115448

RHEL 7 Yum Locked by Another Process During Patch Window

🟡 Medium   ⏱ 5–30 min  Last verified: 20 September 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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Oracle Linux 8 — freerdp security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — freerdp security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1849)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1849 Related CVEs: CVE-2020-11099 CVE-2020-11095 CVE-2020-11096 CVE-2020-11097 CVE-2020-15103 CVE-2020-4030 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 112899

Windows Server 2016 – Hyper-V Replica enters critical state after network interruption – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 September 2020 Affected versions: Windows Server 2016 📖 ~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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Ubuntu 20.04 — mqtt-client — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — mqtt-client — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 September 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6685-1 Related CVEs: CVE-2019-0222 Upstream summary: It was discovered that mqtt-client incorrectly handled memory while parsing malformed MQTT frames. An attacker could possibly use this issue to cause a crash, […]

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Common Problems 112536

Windows Server 2019 — Routing and Remote Access service fails to start — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 September 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 Configure OpenSCAP Security Compliance on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure OpenSCAP Security Compliance 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 […]

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