DNS

How to Set Up Active Directory Domain Services on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up Active Directory Domain Services on Windows Server 2016

How to Install Active Directory Domain Services on Windows Server 2016 Active Directory Domain Services (AD DS) is the cornerstone of identity and access management in Windows environments. Installing AD DS on Windows Server 2016 allows you to create a new forest and domain, manage user accounts, computers, and group policies from a central location. […]

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How to Set Up a Load-Balanced PostgreSQL Cluster with Patroni on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up a Load-Balanced PostgreSQL Cluster with Patroni on RHEL 8

Patroni is a Python-based high-availability solution for PostgreSQL that uses a distributed configuration store — in this tutorial, etcd — to manage leader election, automatic failover, and cluster membership. On RHEL 8, both Patroni and etcd are available through the EPEL repository, making the installation straightforward. This guide walks through installing PostgreSQL, etcd, and Patroni, […]

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Common Problems 118064

Ubuntu 18.04 GNOME Shell freezes or crashes

🟡 Medium   ⏱ 5–30 min  Last verified: 6 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 113402

Windows Server 2012 R2 ReFS Metadata Corruption Warnings on Data Volume – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 October 2020 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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Ubuntu 18.04 — ldns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ldns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5257-1 Related CVEs: CVE-2020-19860 CVE-2020-19861 Upstream summary: It was discovered that ldns incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-19860, CVE-2020-19861) Table […]

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How to Install Lighttpd on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install Lighttpd on Oracle Linux 8

Introduction This tutorial demonstrates how to Install Lighttpd 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 default AppStream […]

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Common Problems 115129

NetworkManager connection missing after reboot – RHEL 8 Post 005

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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 115093

RHEL 8 cockpit web console unreachable after certificate update

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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 114927

firewalld Rule Added but Port Still Closed

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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 113537

Windows Server 2012 R2 — Cumulative update fails because required Servicing Stack Update is missing — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 5 October 2020 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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