DNS

Common Problems 120035

Debian 12 Disk Full from Journal and Log Growth

🔴 Critical   ⏱ 5–30 min  Last verified: 27 September 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 Configure Drone CI on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Drone CI on CentOS Stream 9

Introduction How to Configure Drone CI 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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Common Problems 120125

Debian 12 NGINX 502 Bad Gateway with PHP-FPM

🟠 High   ⏱ 5–30 min  Last verified: 26 September 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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Alpine Linux edge — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 5.7.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — knot-resolver 5.7.1-r0 Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2022-40188 CVE-2020-12667 CVE-2019-19331 CVE-2019-10190 CVE-2019-10191 CVE-2018-1110 Upstream summary: Alpine community repository for vedge ships knot-resolver 5.7.1-r0 which addresses CVE-2023-50387. […]

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Common Problems 117096

Ubuntu 22.04 Secure Boot Blocks NVIDIA Kernel Module Loading

🟡 Medium   ⏱ 5–30 min  Last verified: 26 September 2023 📖 ~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 Set Up Bash Aliases and Environment Variables on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Bash Aliases and Environment Variables on Debian 12

Introduction This guide explains how to Set Up Bash Aliases and Environment Variables 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 […]

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Common Problems 119954

Debian 12 APT Lock Contention During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 25 September 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 117038

Ubuntu 22.04 LTS – UFW blocks application traffic unexpectedly – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 25 September 2023 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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 […]

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How to Use Skopeo for Container Images on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Use Skopeo for Container Images on Oracle Linux 9

Introduction Setting up use skopeo for container images on oracle linux 9 on a Oracle Linux 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Use Skopeo for Container Images on Oracle Linux 9, with all the commands you need, the SELinux and firewalld […]

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How to Set Up Consul Service Mesh on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Consul Service Mesh on Debian 12

Introduction This guide explains how to Set Up Consul Service Mesh 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 […]

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