Kernel Drivers

How to Monitor Nginx with nginx-prometheus-exporter on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Monitor Nginx with nginx-prometheus-exporter on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying monitor nginx with nginx-prometheus-exporter both straightforward and auditable. This tutorial covers the complete procedure for how to Monitor Nginx with nginx-prometheus-exporter on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites You […]

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Common Problems 111195

Windows Server 2025 — RDMA/RoCE traffic disrupted after Hyper-V host NIC driver update — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 6 October 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 Configure Jenkins with HTTPS via Nginx on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure Jenkins with HTTPS via Nginx on Debian 13

Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up configure jenkins with https via nginx on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the […]

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Common Problems 127168

CentOS Stream 10 – Common Problem 171 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 5 October 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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How to Analyse Network Traffic with tshark on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Analyse Network Traffic with tshark on Debian 13

Introduction This guide explains how to Analyse Network Traffic with tshark on Debian 13 on Debian 13 Trixie. Debian Trixie 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 13 install with […]

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Common Problems 111213

Windows Server 2025 — SNI-based SSL binding conflicts between multiple HTTPS sites on IIS — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 October 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 MariaDB 11 on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install MariaDB 11 on Debian 13

Introduction How to Install MariaDB 11 on Debian 13 is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. This […]

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How to Configure DHCP Server with isc-dhcp-server on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure DHCP Server with isc-dhcp-server on Debian 13

Introduction Deploying configure dhcp server with isc-dhcp-server on a Debian 13 Trixie machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will need a […]

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Common Problems 116597

Ubuntu 24.04 LTS – Docker service fails to start with overlay2 errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 October 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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How to Monitor PostgreSQL with postgres_exporter on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Monitor PostgreSQL with postgres_exporter on Debian 13

Introduction This guide explains how to Monitor PostgreSQL with postgres_exporter on Debian 13 on Debian 13 Trixie. Debian Trixie 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 13 install with the […]

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