Logging Monitoring

Oracle Linux 8 — qt5-qtbase and qt5-qtwebsockets — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — qt5-qtbase and qt5-qtwebsockets — security and stability fixes — required update (ELSA-2020-4690)

  • September 28, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 28 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4690 Related CVEs: CVE-2020-0569 CVE-2018-21035 CVE-2020-13962 CVE-2015-9541 CVE-2020-0570 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Common Problems 114902

RHEL 8 RPM Database Locked or Corrupted During Package Operations

  • September 28, 2020
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 28 September 2020 Affected versions: 8.4 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 […]

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How to Configure PHP Error Logging on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure PHP Error Logging on Oracle Linux 8

Introduction How to Configure PHP Error Logging 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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Ubuntu 20.04 — libpam-tacplus — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libpam-tacplus — vulnerability — patch and remediation guide

  • September 28, 2020
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 28 September 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4521-1 Related CVEs: CVE-2020-13881 Upstream summary: It was discovered that pam_tacplus did not properly manage shared secrets if DEBUG loglevel and journald are used. A remote attacker could use this […]

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How to Set Up OpenTelemetry Collector on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up OpenTelemetry Collector on RHEL 7

  • September 28, 2020
  • Linux
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How to Set Up OpenTelemetry Collector on RHEL 7 OpenTelemetry is the emerging industry standard for collecting telemetry data — traces, metrics, and logs — from applications and infrastructure. The OpenTelemetry Collector acts as a vendor-agnostic pipeline component that receives telemetry from instrumented applications, processes it, and exports it to one or more backends such […]

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Oracle Linux 8 — java-1.8.0-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — security and stability fixes — required update (ELSA-2023-0208)

  • September 27, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0208 Related CVEs: CVE-2023-21830 CVE-2023-21843 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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Common Problems 115578

RHEL 7 systemctl Reports Start Limit Hit for API Service

  • September 27, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 27 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 113480

Windows Server 2012 R2 — Group nesting depth limit hit causing membership not to resolve — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 27 September 2020 Affected versions: Windows Server 2012 R2 📖 ~2 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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Common Problems 113434

Windows Server 2016 – Cluster Shared Volume remains in redirected mode – Fix & Prevention (FIX-PREVENTION-2)

🟠 High   ⏱ 5–30 min  Last verified: 27 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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