This guide explains how to replace traditional bastion hosts with AWS Systems Manager Session Manager and CloudWatch Agent, detailing IAM role setup, session logging, and log collection to achieve key‑less, port‑free access, fine‑grained permissions, and centralized, tamper‑proof audit logs for EC2 instances.
This guide shows how to use AWS CLI and CloudWatch Agent to automatically collect, centralize, and alert on EC2 SSH login events, providing a reproducible security‑audit solution that turns invisible system activity into searchable, actionable cloud data.
This article explains why temporary AWS credentials obtained from an EC2 instance role can be copied to a local machine, how to retrieve them via the instance metadata service, and the security risks and best‑practice alternatives for debugging and access control.
This guide explains why storing AWS access keys in config files is risky, how IAM roles eliminate those risks, and provides a three‑step, code‑free process to grant a Java application running on EC2 secure, temporary credentials via the AWS SDK.
An AWS EC2 instance behind an Elastic Load Balancer became unresponsive due to repeated TCP out‑of‑memory errors, which were resolved by examining kernel messages, adjusting tcp_mem‑related kernel parameters, and rebooting the server after a long uptime.
This guide explains the systematic naming convention of AWS EC2 instance types, breaking down families, generations, metal indicators, and size specifications, and provides detailed examples to help you quickly identify the right instance for your workload.
This guide explains step‑by‑step how to modify the instance_type of an AWS EC2 instance using Terraform, covering in‑place updates, required stop‑modify‑start cycles, plan inspection, apply execution, and post‑change verification to ensure the root EBS volume remains intact.
Learn step‑by‑step how to configure the AWS CLI, create a security group, generate a key pair, write a bootstrapping script, and launch an Amazon EC2 instance running an Apache web server, including opening ports and testing the deployment.
This guide walks through installing kubectl on an EC2 instance, configuring the kubeconfig to point to a specific Amazon EKS cluster, and verifying the setup by listing cluster nodes, providing all commands and expected outputs.
This article details GrowingIO's systematic approach to reducing AWS expenses by analyzing billing data, tagging resources, visualizing usage, and applying targeted optimizations across EC2 instances, EBS volumes, HDFS storage, network traffic, and S3, while outlining future automation and scaling plans.
The AWS re:Invent 2017 conference in Las Vegas introduced a range of compute innovations—including Amazon EKS, AWS Fargate, new EC2 instance families, Spot Instance hibernation, Time Sync Service, and a Serverless Application Repository—while showcasing sessions from Netflix and other industry leaders.
This step‑by‑step guide shows how to register for Amazon AWS, launch a free‑tier EC2 instance with Linux, bind an Elastic IP, set up a MySQL RDS database, and deploy a WordPress site, providing a practical hands‑on learning path for Linux operations and cloud computing.
A early‑morning alarm revealed a Plumbr service outage caused by the Linux OOM killer terminating a Java process after memory overcommit, disabled swap, and a traffic spike, and the article explains the root cause, reproduces the issue with code, and offers mitigation strategies.
