DNS

How to Install and Configure Fail2ban on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install and Configure Fail2ban on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up install and configure fail2ban 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 and […]

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How to Configure OpenSCAP Security Compliance on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on Debian 11

Introduction Deploying configure openscap security compliance on debian 11 on a Debian 11 Bullseye 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 […]

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Common Problems 120571

Debian 11 – ext4 Filesystem Remounts Read-Only – Root Cause and Repair

🔴 Critical   ⏱ 5–30 min  Last verified: 13 March 2022 Affected versions: Debian 11 📖 ~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 Install Helm on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install Helm on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install helm on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How to Enable SSL/TLS with Let's Encrypt on Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Enable SSL/TLS with Let’s Encrypt on Apache2 on Debian 9

Introduction How to Enable SSL/TLS with Let’s Encrypt on Apache2 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 […]

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How to Configure Grafana Alerting on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Grafana Alerting on Debian 11

Introduction Deploying configure grafana alerting on debian 11 on a Debian 11 Bullseye 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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How to Configure rkhunter Rootkit Scanner on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure rkhunter Rootkit Scanner on Debian 9

Introduction This guide explains how to Configure rkhunter Rootkit Scanner 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 the […]

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How to Configure ZFS on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure ZFS on Debian 11

Introduction This guide explains how to Configure ZFS on Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with the standard repositories […]

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Common Problems 120648

Debian 11 – software RAID array stays degraded and rebuild does not start

🔴 Critical   ⏱ 5–30 min  Last verified: 12 March 2022 Affected versions: Debian 11 📖 ~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 Install Ruby on Rails on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Ruby on Rails on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying install ruby on rails on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Ruby on Rails on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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