Logging Monitoring

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

Oracle Linux 8 — qt5-qtbase — security and stability fixes — required update (ELSA-2021-1756)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1756 Related CVEs: CVE-2020-17507 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 118585

PHP-FPM Socket Permission Denied with Nginx or Apache

🟡 Medium   ⏱ 5–30 min  Last verified: 14 January 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 115546

RHEL 7 journalctl Vacuum Not Configured in Long-Running Hosts

🟢 Low   ⏱ 5–30 min  Last verified: 14 January 2021 Affected versions: RHEL 7 📖 ~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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Oracle Linux 8 — ruby:2.5 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ruby:2.5 — vulnerability — patch and remediation guide (ELSA-2022-0545)

🟠 High   ⏱ 15–60 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0545 Related CVEs: CVE-2020-36327 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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How to Configure Loki for Log Aggregation on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure Loki for Log Aggregation on SLES 12

Introduction This tutorial covers How to Configure Loki for Log Aggregation 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: […]

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Oracle Linux 8 — icu — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — icu — vulnerability — patch and remediation guide (ELSA-2020-0902)

🟠 High   ⏱ 15–60 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0902 Related CVEs: CVE-2020-10531 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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How to Set Up FluxCD on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up FluxCD on Oracle Linux 8

Introduction How to Set Up FluxCD 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 is […]

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Gentoo Linux — dev-python/pypy — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-python/pypy — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202409-12 Related CVEs: CVE-2020-27619 Upstream summary: Multiple vulnerabilities have been discovered in pypy. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-0127)

🟠 High   ⏱ 15–60 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0127 Related CVEs: CVE-2019-17022 CVE-2019-17017 CVE-2019-17016 CVE-2019-17026 CVE-2019-17024 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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How to Set Up Grafana Alerting and Notification Channels on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Grafana Alerting and Notification Channels on RHEL 8

Grafana 10 ships with a completely redesigned unified alerting engine that replaces the older panel-level alerts, offering multi-dimensional alert rules, flexible notification policies, and first-class support for external notification channels including Slack, email, and PagerDuty. Rather than binding an alert to a single dashboard panel, unified alerting lets you define alert rules independently against any […]

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