Networking

Common Problems 111047

Windows Server 2025 Memory Paging Excessive Due to Non-Paged Pool Leak — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 January 2025 Affected versions: Windows Server 2025 📖 ~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 Set Up Software RAID with mdadm on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Prometheus and Grafana on Ubuntu 24.04

Prometheus is a powerful time-series monitoring system and Grafana is the leading visualisation dashboard. Together they form the most popular open-source monitoring stack. This guide installs both on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Minimum 2 GB RAM Step 1 – […]

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How to Configure Kerberos Authentication in AD on Windows Server 2025 — step-by-step Windows Server 2025 tutorial on Progressive Robot

How to Configure Kerberos Authentication in AD on Windows Server 2025

How to Configure Kerberos Authentication in AD on Windows Server 2025 Kerberos is the default authentication protocol for Active Directory environments, replacing the older NTLM protocol for all domain-joined resources. Every time a domain user accesses a file share, a web application using Windows Authentication, an SQL Server instance, or any other AD-integrated service, Kerberos […]

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How to Set Up Active Directory Sites and Services on Windows Server 2025 — step-by-step Windows Server 2025 tutorial on Progressive Robot

How to Set Up Active Directory Sites and Services on Windows Server 2025

How to Set Up Active Directory Sites and Services on Windows Server 2025 Active Directory Sites and Services is the component of AD DS that maps your logical directory to your physical network topology. Without a correct site configuration, domain controllers replicate over WAN links unnecessarily, clients authenticate against distant DCs instead of local ones, […]

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Common Problems 127058

CentOS Stream 10 – Common Problem 160 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 1 January 2025 Affected versions: CentOS Stream 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 120193

Debian 12 – cloud-init Datasource Timeout Delays Boot – Fast Metadata Recovery

🟡 Medium   ⏱ 5–30 min  Last verified: 1 January 2025 Affected versions: Debian 12 📖 ~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 Set Up Splunk Universal Forwarder on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Set Up Splunk Universal Forwarder on CentOS Stream 10

Introduction How to Set Up Splunk Universal Forwarder on CentOS Stream 10 on CentOS Stream 10 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 […]

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Common Problems 116637

Ubuntu 24.04 LTS – cloud-init hangs and delays first boot – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 January 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 116533

Ubuntu 24.04 LTS – custom nftables rules disappear after reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 1 January 2025 Affected versions: Ubuntu 24.04 LTS Ubuntu 24.04 Ubuntu 24.04.1 📖 ~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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How to Configure Vault PKI Secrets Engine on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure Vault PKI Secrets Engine on CentOS Stream 10

Introduction This tutorial demonstrates how to Configure Vault PKI Secrets Engine on CentOS Stream 10 on CentOS Stream 10. 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 CentOS Stream 10 system with […]

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