Logging Monitoring

Common Problems 117478

Ubuntu 20.04 LTS – system fails to boot after kernel update

🔴 Critical   ⏱ 5–30 min  Last verified: 23 March 2021 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 […]

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Common Problems 112435

Windows Server 2019 — MSU update package fails to install with hash mismatch corrupt error — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 March 2021 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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How to Set Up a Kubernetes Dashboard on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Kubernetes Dashboard on Oracle Linux 8

Introduction This tutorial demonstrates how to Set Up a Kubernetes Dashboard on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with […]

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How to Install MySQL via AIX Toolbox on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Install MySQL via AIX Toolbox 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 install mysql via aix toolbox on ibm aix 7.1 […]

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How to Configure Windows Server 2019 Software Load Balancer — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Software Load Balancer

How to Configure Windows Server 2019 Software Load Balancer Software Load Balancer (SLB) is a component of the Windows Server 2019 Software Defined Networking (SDN) stack that provides inbound and outbound network traffic load balancing and Network Address Translation (NAT). SLB operates at Layer 4 (TCP/UDP) and distributes connections across backend server pools using ECMP […]

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Oracle Linux 8 — postgresql:10 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — postgresql:10 — vulnerability — patch and remediation guide (ELSA-2022-1830)

🟡 Medium   ⏱ 10–30 min  Last verified: 23 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1830 Related CVEs: CVE-2021-23214 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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Amazon Linux 2 — kernel-livepatch-4.14.203-156.332 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.203-156.332 — vulnerability — 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-2021-035 Related CVEs: CVE-2020-28374 Upstream summary: A flaw was found in the Linux kernel's implementation of the Linux SCSI target host, where an authenticated attacker could write to any block […]

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How to Use Skaffold for Kubernetes Development on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use Skaffold for Kubernetes Development on RHEL 7

How to Use Skaffold for Kubernetes Development on RHEL 7 One of the most tedious aspects of Kubernetes development is the inner loop: make a code change, build a container image, push it to a registry, update the Kubernetes manifest, apply it to the cluster, and wait for the rolling update — repeated dozens of […]

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openSUSE Tumbleweed — guix — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — guix — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-27851 Upstream summary: A security vulnerability that can lead to local privilege escalation has been found in 'guix-daemon'. It affects multi-user setups in which 'guix-daemon' […]

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