Backup Recovery

How to Configure HTTP/2 on Nginx on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure HTTP/2 on Nginx on Debian 12

Introduction This guide explains how to Configure HTTP/2 on Nginx 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 Prometheus and Grafana on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Prometheus and Grafana on CentOS Stream 9

Introduction Setting up install prometheus and grafana 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 Install Prometheus and Grafana on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to […]

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Common Problems 120182

Debian 12 – PostgreSQL fails to start due to data directory permissions

🟠 High   ⏱ 5–30 min  Last verified: 6 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 Suricata IDS/IPS on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Suricata IDS/IPS on Debian 12

Introduction Deploying set up suricata ids/ips on debian 12 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 Before you […]

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How to Install and Configure Fail2ban on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install and Configure Fail2ban on Debian 12

Introduction This guide explains how to Install and Configure Fail2ban 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 Configure CentOS Stream 9 for OpenStack — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure CentOS Stream 9 for OpenStack

Introduction This tutorial demonstrates how to Configure CentOS Stream 9 for OpenStack on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default AppStream […]

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Debian 12 — borgbackup — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — borgbackup — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 5 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-10099 CVE-2016-10100 CVE-2017-15914 CVE-2023-36811 Upstream summary: Borg (aka BorgBackup) before 1.0.9 has a flaw in the cryptographic protocol used to authenticate the manifest (list of archives), potentially allowing […]

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Common Problems 119974

Debian 12 NO_PUBKEY Signature Verification Failure

🟠 High   ⏱ 5–30 min  Last verified: 5 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 Install Rancher Desktop on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install Rancher Desktop on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up install rancher desktop 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 the […]

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How to Install SQLite3 on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install SQLite3 on Debian 12

Introduction How to Install SQLite3 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. This tutorial […]

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