Problem How to create a AWS S3 bucket with some specific configuration? There will be 3 main approaches to the problem: Take help of UI. You click bunch of button in the AWS console and set it...

Amazon CloudWatch Metrics Provides metrics for every services in AWS Metric is a variable to monitor(CPU, RAM and so on) Dimension is an attribute of a metric(instance id, environment etc) ...

AWS Dynamo DB Fully managed, highly available with replication across multiple AZs NoSQL DB with transactional support Scale to massive workloads, distributed DBs. Millions of req per sec...

SQS Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple the components of your application. SQS stores messages in a highly available and durable man...

DNS(Domain Name System) Responsible for translating human friendly hostnames to IP Terminologies Domain Registrar - A company that registers domain names on behalf of individuals or organiza...

Note - Not every resource is present in all the regions IAM refers to Identity Access Management. A bit on Root Account Root account has the most access. It shouldn’t be used because of the fol...

Started this journey on Jan 28, 2026. I committed to spend atleast 4 hours dedicating to it. This will run till April 28, 2026. Today is Feb 15, 2026, I have missed 3-4 days of studying. Maintainin...

Motivation When I connect to a website, I see a padlock that says “Your connection is secure”. I have some idea about HTTP, HTTPS, SSL, TLS, public key, private key, certificates but I can’t conne...

Contents Motivation Namespaces and Cgroups Container Runtime Container vs VM Docker Docker Networking OverlayFS(and Docker) Image Layering and caching Persisting data with docke...

OverlayFS: concepts, conflicts, and whiteouts OverlayFS is a union filesystem in the Linux kernel. It lets you stack a writable layer on top of one or more read-only layers and present a single me...