Kernel Drivers

How to Set Up ProxySQL for MySQL Load Balancing on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up ProxySQL for MySQL Load Balancing on Debian 12

Introduction How to Set Up ProxySQL for MySQL Load Balancing 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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How to Install Debian 12 Bookworm on a Server — step-by-step Debian 12 tutorial on Progressive Robot

How to Install Debian 12 Bookworm on a Server

Introduction Deploying install debian 12 bookworm on a server on a Debian 12 Bookworm 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 […]

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Oracle Linux 9 — kernel security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-4377)

🟠 High   ⏱ 15–60 min  Last verified: 2 January 2024 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-4377 Related CVEs: CVE-2023-0458 CVE-2023-35788 CVE-2022-45869 CVE-2023-3090 CVE-2023-1998 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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How to Configure syslog on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure syslog on FreeBSD 14

Introduction How to Configure syslog on FreeBSD 14 is a core administration task for any FreeBSD 14 server operator. FreeBSD 14 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, and […]

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How to Install Graylog Log Management on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install Graylog Log Management on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up install graylog log management 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 carefully and […]

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How to Set Up Nginx as a Reverse Proxy on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Nginx as a Reverse Proxy on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up set up nginx as a reverse proxy 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 […]

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Common Problems 117000

Ubuntu 22.04 LTS Cloud-Init Overwrites Manual Network Configuration

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 2024 📖 ~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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How to Install MySQL 8 on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install MySQL 8 on CentOS Stream 9

Introduction How to Install MySQL 8 on CentOS Stream 9 on CentOS Stream 9 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 is […]

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NetBSD 9.4 — xentools3-hvm — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — xentools3-hvm — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2008-0928 CVE-2008-1945 Upstream summary: pkgsrc audit-packages flagged xentools3-hvm<3.1.4 for vulnerability class 'security-bypass'. Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0928 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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How to Use Prometheus Blackbox Exporter on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Use Prometheus Blackbox Exporter on FreeBSD 14

Introduction How to Use Prometheus Blackbox Exporter on FreeBSD 14 is a core administration task for any FreeBSD 14 server operator. FreeBSD 14 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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