Kernel Drivers

Common Problems 120086

Debian 12 mdadm RAID Array Degraded After Drive Failure

🔴 Critical   ⏱ 5–30 min  Last verified: 14 August 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 120161

Debian 12 – Nginx fails config test due to duplicate or invalid directives

🟠 High   ⏱ 5–30 min  Last verified: 13 August 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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Amazon Linux 2023 — kernel-livepatch-6.1.61-85.141 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — kernel-livepatch-6.1.61-85.141 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023LIVEPATCH-2023-020 Related CVEs: CVE-2023-6111 Upstream summary: A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The function nft_trans_gc_catchall did not remove […]

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Common Problems 117457

Ubuntu 20.04 GNOME Shell High CPU Usage

🟡 Medium   ⏱ 5–30 min  Last verified: 13 August 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 Cockpit Web Console on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Cockpit Web Console on CentOS Stream 9

Introduction How to Set Up Cockpit Web Console 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 […]

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How to Configure Apache with mod_security on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Apache with mod_security on Oracle Linux 9

Introduction How to Configure Apache with mod_security on Oracle Linux 9 on Oracle Linux 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 […]

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Oracle Linux 9 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel — vulnerability — patch and remediation guide (ELSA-2023-12836)

🟠 High   ⏱ 15–60 min  Last verified: 12 August 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12836 Related CVEs: CVE-2023-20593 CVE-2023-3610 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Set Up Yubikey Authentication on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Yubikey Authentication on Debian 12

Introduction How to Set Up Yubikey Authentication 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. […]

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How to Set Up ClamAV Antivirus on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up ClamAV Antivirus on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying set up clamav antivirus on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up ClamAV Antivirus on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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How to Set Up Minio Object Storage on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Minio Object Storage on Debian 12

Introduction Deploying set up minio object storage 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 Ensure […]

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