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Introduction

SSH is commonly used to connect to Linux-based Amazon EC2 instances for server administration and troubleshooting.

Sometimes an EC2 instance may be running normally. However, the SSH connection can still fail due to issues with the Security Group, Network ACL, route table, SSH service, key permissions, or instance configuration.

In this art...


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Introduction

Every Kubernetes cluster secured with kubeadm relies on TLS certificates to protect communication between the control plane components. These certificates have a limited validity period and must be renewed before they expire.

If certificate expiration is ignored, administrators may experience issues such as:

Unable to connect...

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Objective

The objective of this module is to design and implement a secure and scalable authentication system for modern web applications. The architecture enables users to securely verify their identity, manage access sessions, and protect application resources through industry-standard authentication mechanisms while ensuring security, maintainability, and future scalabi...


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Introduction

Metabase is a popular open-source business intelligence and data visualization platform that connects to multiple databases and allows users to create dashboards and reports. As a Metabase administrator, you may need to view all configured database connections for auditing, troubleshooting, or migration purposes.

This article explains how to list all...


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Introduction

Jenkins supports distributed builds by using agents (nodes). A Windows agent allows Jenkins to execute jobs on a Windows machine while the Jenkins controller manages the pipeline.

This guide explains how to connect a Windows machine as a Jenkins agent using the Launch agent by connecting it to the controller (Inbound Agent)


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