Networking

Common Problems 124091

Oracle Linux 10 – rsyslog Queue Backlog Causes Log Loss Risk – Throughput Tuning

🟡 Medium   ⏱ 5–30 min  Last verified: 4 October 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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Common Problems 119544

Debian 13 – UFW policy blocks package downloads and outbound HTTPS

🟡 Medium   ⏱ 5–30 min  Last verified: 4 October 2025 Affected versions: Debian 13 Debian 13 (Trixie) Debian 13.x 📖 ~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 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 119474

Debian 13 – boot is delayed by systemd-networkd-wait-online timeout

🟡 Medium   ⏱ 5–30 min  Last verified: 4 October 2025 Affected versions: Debian 13 Debian 13 (Trixie) Debian 13.x 📖 ~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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Common Problems 116531

UFW Blocking Kubernetes Traffic on Ubuntu 24.04 LTS

🟠 High   ⏱ 5–30 min  Last verified: 4 October 2025 Affected versions: 24.04 📖 ~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 […]

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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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How to Install PHP 8.3 on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install PHP 8.3 on Debian 13

Introduction How to Install PHP 8.3 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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Common Problems 127178

CentOS Stream 10 – Common Problem 172 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 3 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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Common Problems 113921

RHEL 10 – NetworkManager service not starting after config drift – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 October 2025 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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How to Schedule Tasks with cron on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Schedule Tasks with cron on Oracle Linux 10

Introduction How to Schedule Tasks with cron on Oracle Linux 10 on Oracle Linux 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 configuration […]

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