Kernel Drivers

How to Configure Fail2ban on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Fail2ban on Oracle Linux 9

Introduction How to Configure Fail2ban 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 is reproducible […]

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How to Configure Windows Server 2022 IPAM — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Windows Server 2022 IPAM

Introduction to PowerShell Remoting for Server Management PowerShell Remoting is the built-in mechanism for executing commands and scripts on remote Windows machines. It uses the WS-Management protocol (WinRM) and provides a secure, scriptable channel for managing fleets of Windows Server 2022 machines from a single administrative workstation or CI/CD agent. This guide covers everything from […]

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How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2

How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2012 R2 While Windows Server Backup provides a built-in GUI-based backup solution, many enterprise environments require custom backup scripts that handle specific scenarios not covered by WSB — such as application-specific export procedures, database dumps, configuration file backups, scripted verification of backup completeness, and integration […]

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Common Problems 115629

SELinux AVC Flood Causing Performance Degradation

🟡 Medium   ⏱ 5–30 min  Last verified: 24 March 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 Configure Redis Cluster on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Redis Cluster on Oracle Linux 9

Introduction Oracle Linux 9 ships with a stable, security-hardened base that makes deploying configure redis cluster on oracle linux 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Redis Cluster on Oracle Linux 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Common Problems 115426

RHEL 7 SELinux Denies httpd Write Access to Web Content

🟠 High   ⏱ 5–30 min  Last verified: 24 March 2023 Affected versions: RHEL 7 📖 ~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 111761

Windows Server 2022 — SQL Server TCP/IP dynamic port changing after service restart breaking connections — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 24 March 2023 Affected versions: Windows Server 2022 📖 ~2 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 2 — kernel-livepatch-4.14.296-222.539 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.296-222.539 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2023-096 Related CVEs: CVE-2022-3524 CVE-2022-3564 Upstream summary: A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this vulnerability is the function ipv6_renew_options of the […]

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How to Configure Buildbot CI on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Buildbot CI on Debian 9

Introduction How to Configure Buildbot CI 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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Common Problems 114503

RHEL 9 dnf upgrade blocked by module stream conflicts

🟡 Medium   ⏱ 5–30 min  Last verified: 23 March 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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