February 2021 - Page 9 of 57

Building for Production: Web Applications — Recovery Planning — step-by-step DevOps tutorial on Progressive Robot

Building for Production: Web Applications — Recovery Planning

In this part of the “Building for Production: Web Applications” series (3 of 6), we will devise a recovery plan. A recovery plan is a set of documented procedures to recover from potential failures or administration errors within your server setup. Creating a recovery plan will also help you identify the essential components and data of your application server setup.

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How to Configure Always On VPN with Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Always On VPN with Windows Server 2012 R2

How to Configure Always On VPN with Windows Server 2012 R2 Always On VPN is a remote access solution that provides seamless, persistent VPN connectivity for domain-joined Windows clients. Unlike traditional VPN solutions that require users to manually initiate connections, Always On VPN automatically establishes and maintains VPN tunnels without user intervention. On Windows Server […]

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Oracle Linux 8 — Kdump Might Fail on Some AMD Hardware — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Kdump Might Fail on Some AMD Hardware

🟠 High   ⏱ 5–30 min  Last verified: 24 February 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: Oracle Bug 31274238 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 […]

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Common Problems 119147

Ubuntu 14.04 LTS – swap partition not activating at boot

🟡 Medium   ⏱ 5–30 min  Last verified: 24 February 2021 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 119130

Ubuntu 14.04 LTS SNMP Monitoring Gaps After Community String Rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 24 February 2021 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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Common Problems 118463

Ubuntu 16.04 LTS – inode exhaustion despite available disk space – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 February 2021 Affected versions: Ubuntu 16.04 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 Configure Vault PKI Secrets Engine on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Vault PKI Secrets Engine on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure Vault PKI Secrets Engine 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 Work with Strings in PHP — step-by-step Programming tutorial on Progressive Robot

How To Work with Strings in PHP

A string is a sequence of one or more characters that may consist of letters, numbers, or symbols. In this article, you will learn how to create and view the output of strings, use escape sequences, concatenate strings, store strings in variables, and the rules of using quotes, apostrophes, and newlines within strings in PHP.

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