Troubleshooting

Common Problems 121511

Debian 9 – Network Interface Rename Breaks Connectivity – Persistent Naming Fix

🟠 High   ⏱ 5–30 min  Last verified: 25 November 2020 Affected versions: Debian 9 📖 ~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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Arch Linux — lldpd — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — lldpd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202101-29 Related CVEs: CVE-2020-27827 Upstream summary: Type: information disclosure. Status: Fixed. Affected: 1.0.7-1. Fixed in: 1.0.8-1. Group: AVG-1451. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Configure SNMP Traps on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure SNMP Traps on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure snmp traps on ibm aix 7.1 on IBM […]

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How to Set Up Oracle Linux 8 in AWS — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Oracle Linux 8 in AWS

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up oracle linux 8 in aws both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Oracle Linux 8 in AWS, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Use PowerShell to Manage Hyper-V on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Use PowerShell to Manage Hyper-V on Windows Server 2012 R2

How to Use PowerShell to Manage Hyper-V on Windows Server 2012 R2 PowerShell is the most powerful and efficient way to manage Hyper-V on Windows Server 2012 R2. The Hyper-V module contains over 150 cmdlets covering every aspect of virtual machine lifecycle management, virtual switch configuration, storage management, networking, replication, and host configuration. Mastering PowerShell […]

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How to Configure Docker Networks on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Docker Networks on Debian 9

Introduction Deploying configure docker networks on debian 9 on a Debian 9 Stretch 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 begin, […]

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Oracle Linux 8 — tcpdump security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — tcpdump security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4760)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4760 Related CVEs: CVE-2018-10103 CVE-2018-14879 CVE-2018-16451 CVE-2018-14882 CVE-2018-16228 CVE-2018-14467 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118939

Ubuntu 14.04 LTS DNS Resolution Intermittently Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 24 November 2020 Affected versions: 14.04 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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How to Use lssrc, startsrc, and stopsrc on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use lssrc, startsrc, and stopsrc on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use lssrc, startsrc, and stopsrc on ibm aix 7.1 […]

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How to Set Up X11 Forwarding on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Set Up X11 Forwarding 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 x11 forwarding on ibm aix 7.2 on […]

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