DNS

Common Problems 113953

RHEL 10 – NetworkManager connection profile ignored after reboot – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: RHEL 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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Common Problems 115930

Ubuntu 26.04 LTS DKMS Module Build Fails After Kernel Update

🔴 Critical   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 26.04 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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How to Configure Static File Serving with Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Static File Serving with Nginx on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure static file serving with nginx both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Static File Serving with Nginx on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Common Problems 122175

PF State Table Exhaustion Under Traffic Spikes

🟡 Medium   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: FreeBSD 15 📖 ~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 116054

Ubuntu 26.04 LTS – system journal grows rapidly and fills disk – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 26.04 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 116057

Ubuntu 26.04 LTS – Sudo fails with unable to resolve host warning – Fix & Prevention

🟢 Low   ⏱ 5–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 26.04 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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How to Configure PostgreSQL Point-in-Time Recovery on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure PostgreSQL Point-in-Time Recovery on FreeBSD 15

Introduction This guide explains how to Configure PostgreSQL Point-in-Time Recovery on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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How to Configure PostgreSQL Remote Access on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure PostgreSQL Remote Access on FreeBSD 15

Introduction This guide explains how to Configure PostgreSQL Remote Access on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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Common Problems 114420

Kernel Updated but Reboot Not Performed

🟡 Medium   ⏱ 5–30 min  Last verified: 24 May 2026 📖 ~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 115979

Ubuntu 26.04 LTS – grub update fails and kernel menu entries are missing

🟠 High   ⏱ 5–30 min  Last verified: 24 May 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~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 […]

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