DNS

Common Problems 116445

Ubuntu 24.04 LTS – UFW rules accidentally block SSH access – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Ubuntu 24.04 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 111148

Windows Server 2025 — GPU driver memory leak causing host memory exhaustion on Hyper-V — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Windows Server 2025 📖 ~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 Errors […]

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How to Manage Node.js with NVM on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Manage Node.js with NVM on Oracle Linux 10

Introduction Setting up manage node.js with nvm on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Manage Node.js with NVM on Oracle Linux 10, with all the commands you need, the SELinux and firewalld considerations to […]

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Common Problems 111115

Windows Server 2025 — Profile size quota exceeded preventing login on Server 2025 — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Windows Server 2025 📖 ~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 Errors […]

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How to Install and Configure Dovecot IMAP Server on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Configure Dovecot IMAP Server on RHEL 9

Dovecot is a fast, secure, and easy-to-configure IMAP and POP3 server that works seamlessly alongside Postfix on RHEL 9. Once Postfix is delivering incoming mail to a user’s Maildir, Dovecot allows mail clients such as Thunderbird or Outlook to retrieve those messages over IMAP or POP3 — with optional SSL/TLS encryption for both protocols. This […]

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Common Problems 114080

RHEL 10 – kdump does not capture vmcore on panic because crashkernel is mis-sized – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 7 August 2025 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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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Common Problems 123984

SELinux Denials Break Custom Web Application Access

🟠 High   ⏱ 5–30 min  Last verified: 7 August 2025 Affected versions: Oracle Linux 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 & Hardening Related Errors […]

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How to Install Nomad on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Nomad on Oracle Linux 10

Introduction Setting up install nomad on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Nomad on Oracle Linux 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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How to Set Up a Private Docker Registry on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Set Up a Private Docker Registry on Oracle Linux 10

Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying set up a private docker registry on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up a Private Docker Registry on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, […]

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How to Configure Rate Limiting in Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Rate Limiting in Nginx on RHEL 10

Introduction Setting up configure rate limiting in nginx on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure Rate Limiting in Nginx on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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