DNS

How to Configure PostgreSQL Replication on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure PostgreSQL Replication on Oracle Linux 8

Introduction How to Configure PostgreSQL Replication 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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Common Problems 113076

Windows Server 2016 Tiered Storage Spaces Not Rebalancing Hot Data Correctly – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 2021 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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How to Install Prometheus on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Prometheus on Debian 9

Introduction This guide explains how to Install Prometheus on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the standard repositories […]

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Common Problems 117562

Ubuntu 20.04 LTS Proxy Misconfiguration Breaks apt and curl

🟡 Medium   ⏱ 5–30 min  Last verified: 26 March 2021 Affected versions: 20.04 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 113617

Windows Server 2012 R2 — Express Update Downloads Saturate WAN and Delay Patch Completion — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 26 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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How to Install and Use Helm on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Use Helm on RHEL 8

Helm is the package manager for Kubernetes, allowing you to define, install, and upgrade even the most complex applications through reusable, versioned packages called charts. Rather than managing a collection of disconnected YAML manifests, Helm wraps them into a single chart with templating, default values, and lifecycle hooks. On RHEL 8 the installation is straightforward: […]

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How to Configure AIDE File Integrity Monitoring on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure AIDE File Integrity Monitoring on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure AIDE File Integrity Monitoring 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 […]

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Common Problems 113061

Windows Server 2016 — Feature on Demand Payload Missing Blocks Security Update Chain — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 25 March 2021 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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Oracle Linux 8 — bind security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-2092)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-2092 Related CVEs: CVE-2021-25219 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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