January 2021 - Page 52 of 69

Common Problems 112437

Windows Server 2019 – Hyper-V vmswitch driver fails to bind after NIC update – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Windows Server 2019 📖 ~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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Oracle Linux 8 — bind — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind — vulnerability — patch and remediation guide (ELSA-2021-0670)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0670 Related CVEs: CVE-2020-8625 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 SSH Key Authentication on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure SSH Key Authentication on SLES 12

Introduction This tutorial covers How to Configure SSH Key Authentication on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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Securing Communications in a Three-tier Rails Application Using SSH Tunnels — step-by-step Linux tutorial on Progressive Robot

Securing Communications in a Three-tier Rails Application Using SSH Tunnels

Web applications are often architected with three distinct tiers: the presentation layer, which is what the user sees, the application layer, which provides the business logic of the application, and the data layer which stores the application’s data. In this tutorial, you will deploy a Rails app in a three-tier configuration by installing a unique set of software on three separate servers, configuring each server and their components to communicate and function securely and effectively.

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Verwenden von Axios mit React — step-by-step Javascript tutorial on Progressive Robot

Verwenden von Axios mit React

Axios ist ein leichter, Zusage-basierter HTTP-Client. In diesem Artikel erkunden Sie Beispiele für die Verwendung von Axios für den Zugriff auf die beliebte JSON Placeholder-API innerhalb einer React-Anwendung.

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How to Configure Custom Metrics with Prometheus on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Custom Metrics with Prometheus on Oracle Linux 8

Introduction How to Configure Custom Metrics with Prometheus on Oracle Linux 8 on Oracle Linux 8 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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