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What is Linux filesystem? Filesystem defines how data is store in a disk. Why do we need Filesystem? Lets say you have created a partition , but partition alone does not make a disk usable in the OS. The disk and kernel is seen by the linux kernel as...
Introduction In a networked world, systems often need to communicate with each other using names rather than IP addresses. This is where DNS (Domain Name System) comes into play. However, before diving into centralized DNS, it’s important to understa...
A beginner-friendly guide to containerizing a Node.js app, handling environment configs with Kubernetes, and deploying it like a pro. Step 1: Add the current user to the "docker" group. sudo usermod -aG docker $USER Step 2: Create a Simple Node.js A...
What will you do if you do not have any scheduler in your Kubernetes cluster? You might not want to rely on the built-in scheduler and instead prefer to schedule the pods yourself. How does the scheduler work in the backend?In the pod definition file...
Terraform is a free and open-source tool developed by HashiCorp. It installs as a single binary, allowing for quick setup and enabling you to build, manage, and deploy infrastructure in just minutes. One of the biggest advantages of Terraform is its ...
What is Switching: Say we have 2 computer/ VMs on cloud or desktops. How does system-A reach system-B? We connect them to a switch, which creates the network. To connect them to the switch, each host needs an interface, either physical or virtual, d...
A resource-based policy is directly attached to a resource (e.g., an S3 bucket, a DynamoDB table, etc.) and defines who can access the resource. Key Components of a Resource-Based Policy Principal: Specifies the AWS account or user that is allowed o...
IAM Groups: IAM Groups are used to manage users. Here are some best practices for IAM Groups: Simplify User Management: IAM Groups make managing users easier. Descriptive Names: IAM Groups should have descriptive names. Similar Roles: Add users wi...
IAM Users: IAM users are created within an AWS account and represent a person or application that interacts with AWS services. Each IAM user has a unique name within the AWS account and can be assigned permissions via policies. So, we need to create ...