Kernel Drivers

How to Set Up Prometheus Node Exporter on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Set Up Prometheus Node Exporter on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up prometheus node exporter on ibm aix 7.2 […]

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How to Install k3s Lightweight Kubernetes on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install k3s Lightweight Kubernetes on RHEL 7

How to Install k3s Lightweight Kubernetes on RHEL 7 k3s is a certified, production-ready Kubernetes distribution engineered for resource-constrained environments. Developed by Rancher Labs (now part of SUSE), it packages the entire Kubernetes control plane into a single binary under 100 MB, includes Traefik as a built-in ingress controller, and removes legacy or alpha features […]

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

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2022-9726)

🟠 High   ⏱ 15–60 min  Last verified: 2 January 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9726 Related CVEs: CVE-2022-21385 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Configure Apache2 with mod_security on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Apache2 with mod_security on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure apache2 with mod_security 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 Set Up Open-iSCSI on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Open-iSCSI on Debian 9

Introduction How to Set Up Open-iSCSI 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 […]

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How to Configure Active Directory Audit Policy on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Active Directory Audit Policy on Windows Server 2022

Introduction to Group Policy on Windows Server 2022 Group Policy is the primary mechanism for applying configuration settings, security baselines, and software deployments across computers and users in an Active Directory domain. A Group Policy Object (GPO) is a collection of settings that are applied to computer accounts (via the Computer Configuration node) or user […]

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Common Problems 117966

Ubuntu 18.04 LTS – system boots to grub rescue after package update – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 29 December 2022 Affected versions: Ubuntu 18.04 LTS 📖 ~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 116964

Ubuntu 22.04 LTS EXT4 Remounts Read-Only After I/O Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 29 December 2022 📖 ~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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Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2022-9730)

🟠 High   ⏱ 15–60 min  Last verified: 29 December 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9730 Related CVEs: CVE-2022-21385 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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