May 2023 - Page 69 of 72

Common Problems 111660

Windows Server 2022 — SDN network controller refuses to deploy due to certificate trust — Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 29 May 2026 Affected versions: Windows Server 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 […]

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What is the DOM? — step-by-step DevOps tutorial on Progressive Robot

What is the DOM?

The Document Object Model, usually shortened to *the DOM*, is a cross-platform, language-independent application programming interface for HTML and XML documents.

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Oracle Linux 9 — grafana-pcp — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — grafana-pcp — vulnerability — patch and remediation guide (ELSA-2022-8250)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-8250 Related CVEs: CVE-2022-32148 CVE-2022-30635 CVE-2022-30630 CVE-2022-30631 CVE-2022-1705 CVE-2022-30632 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Install Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Apache2 on Debian 9

Introduction Deploying install apache2 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 You will need a […]

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Oracle Linux 8 — microcode_ctl — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — microcode_ctl — vulnerability — patch and remediation guide (ELSA-2023-12988)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12988 Related CVEs: CVE-2023-23583 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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Scala Advanced Interview Questions and Answers — step-by-step DevOps tutorial on Progressive Robot

Scala Advanced Interview Questions and Answers

URL: https://www.progressiverobot.com/scala-advanced-interview-questions/ Before reading this post, please go through my previous two posts at "[Scala Basic](/community/tutorials/scala-interview-questions-answers)" and "[Scala Intermediate](/community/tutorials/scala-interview-questions)" Interview Questions and Answers to get some basic knowledge about Scala Language. Scala Advanced Interview Questions In this post, we are going discuss about some Advanced Scala Interview Questions that are related to Scala Advanced concepts […]

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Oracle Linux 9 — edk2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — edk2 — vulnerability — patch and remediation guide (ELSA-2024-23120)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-23120 Related CVEs: CVE-2023-45231 CVE-2022-36763 CVE-2023-45230 CVE-2022-36765 CVE-2022-36764 CVE-2023-45229 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How To Install and Configure NATS on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure NATS on Ubuntu 16.04

NATS is an open source high performance messaging system, often described as “a central nervous system for the cloud”. In this tutorial you’ll configure gnats, the official NATS server and create a basic server overload warning system that sends out emails when server load gets too high, using `gnatsd` as its message broker.

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