DNS

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 12 (DEBIAN-12-2)

Introduction How to Configure Nginx as a TCP/UDP Load Balancer on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm 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 […]

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Debian 12 — dnstracer — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — dnstracer — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-9430 Upstream summary: Stack-based buffer overflow in dnstracer through 1.9 allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a […]

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How to Set Up BGP Routing with BIRD on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up BGP Routing with BIRD on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up set up bgp routing with bird on debian 12 on Bookworm leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bookworm freeze. Follow each step […]

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Common Problems 119979

Debian 12: NTP drift and unsynchronized system clock

🟡 Medium   ⏱ 5–30 min  Last verified: 14 November 2023 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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Common Problems 112441

Windows Server 2019 – Storage Replica partnership unhealthy with growing log backlog – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 November 2023 Affected versions: Windows Server 2019 📖 ~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 OSPF with FRRouting on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure OSPF with FRRouting on Debian 12

Introduction This guide explains how to Configure OSPF with FRRouting on Debian 12 on Debian 12 Bookworm. Debian Bookworm 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 12 install with the […]

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How to Install PHP 8.2 CLI on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install PHP 8.2 CLI on Debian 12

Introduction How to Install PHP 8.2 CLI on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm 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. […]

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Common Problems 120124

Debian 12 NTP Sync Not Active and Clock Drift Increases

🟡 Medium   ⏱ 5–30 min  Last verified: 13 November 2023 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 Varnish Cache on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Varnish Cache on CentOS Stream 9

Introduction Setting up set up varnish cache on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Varnish Cache on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to […]

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Common Problems 117001

Ubuntu 22.04 LTS – /boot full prevents kernel updates – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 November 2023 Affected versions: Ubuntu 22.04 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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