Debian 9

Common Problems 121531

Debian 9 – nftables Rules Missing After Reboot – Persistent Firewall Setup

🟠 High   ⏱ 5–30 min  Last verified: 6 December 2021 Affected versions: Debian 9 📖 ~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 XFS File System on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure XFS File System on Debian 9

Introduction How to Configure XFS File System on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. […]

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How to Configure Blackbox Exporter on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Blackbox Exporter on Debian 9

Introduction Deploying configure blackbox exporter on debian 9 on a Debian 9 Stretch 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 Before you begin, […]

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Common Problems 121571

Debian 9 – ext4 Filesystem Remounts Read-Only – Root Cause and Repair

🔴 Critical   ⏱ 5–30 min  Last verified: 29 November 2021 Affected versions: Debian 9 📖 ~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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Установка комплекта Linux, Apache, MariaDB, PHP (LAMP) в Debian 9 — step-by-step Linux tutorial on Progressive Robot

Установка комплекта Linux, Apache, MariaDB, PHP (LAMP) в Debian 9

Комплект LAMP — это набор программного обеспечения с открытым исходным кодом, которое обычно устанавливается в комплексе для размещения на сервере динамических сайтов и веб-приложений. Этот термин представляет собой аббревиатуру. Операционная система Linux используется с…

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How to Configure Network Bonding with LACP on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Network Bonding with LACP on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure network bonding with lacp on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully […]

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How to Install Lua on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Lua on Debian 9

Introduction How to Install Lua on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. This tutorial […]

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How to Configure a VXLAN Overlay Network on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure a VXLAN Overlay Network on Debian 9

Introduction How to Configure a VXLAN Overlay Network on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 […]

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Common Problems 121648

Sudo Fails Due to Incorrect /etc/sudoers Permissions

🔴 Critical   ⏱ 5–30 min  Last verified: 9 November 2021 Affected versions: Debian 9 📖 ~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 ModSecurity WAF with Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure ModSecurity WAF with Apache2 on Debian 9

Introduction This guide explains how to Configure ModSecurity WAF with Apache2 on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with […]

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