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How to AWS Assume Role and then revert to the previous role after

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If you need to assume a role in AWS and then revert back to the previous role once complete, you can use the following snippet of code:

Essential Policies for Administering an AWS EKS Cluster

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So, what policies does my role need to create an AWS EKS cluster and be the admin?

Show the Top 10 Largest Directories on Linux

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If you need to see the top 10 largest directories on your Linux system, you can use the following command:

Retrieve the Latest Versioned Tag from AWS ECR in Bash

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Managing Docker images in Amazon Elastic Container Registry (ECR) is a common task for many developers and DevOps practitioners.

How to install MySQL on AmazonLinux2023

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If you are using Amazon Linux 2023 base-image, and you have tried to run yum install -y mysql, you will soon realize that it doesn’t work.

Run any version of Terrform using Docker

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So our friend Docker comes around for another usecase. Run Terraform (any version) from Docker In this example, we will try and configure Terraform 1.

Select * to Show Database Table Sizes MariaDB

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In database management, understanding the size of your tables is crucial for optimizing performance and ensuring efficient resource utilization.

The Future Prospects of DevOps in an AI World

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Abstract DevOps has become an integral part of modern software development, emphasizing communication and collaboration between software developers and IT operations professionals.

Supercharge Your Code with Amazon CodeWhisperer

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Amazon CodeWhisperer is a cutting-edge service that leverages advanced AI and machine learning to provide real-time code generation, recommendations, and security analysis.

A Deep Dive into Machine Learning Algorithms

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Machine learning algorithms are the backbone of modern artificial intelligence. They enable computers to learn and make predictions or decisions without being explicitly programmed.

What is GitHub? A Comprehensive Guide from Basics to Advanced

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GitHub is a platform that has revolutionized the world of software development, enabling individuals and teams to collaborate efficiently on projects of all sizes.

Connect IPv4 and IPv6 Networks Seamlessly with Amazon VPC Lattice

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As the internet continues to grow, the transition from IPv4 to IPv6 has become more critical.

Building Event-Driven Architectures with Amazon EventBridge

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In the realm of real-time data streaming applications, managing the routing and processing of events efficiently is a complex challenge.

Splitting Terraform Modules into Separate Git Repositories

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In the world of Infrastructure as Code (IaC) , Terraform has emerged as a powerful tool for managing infrastructure resources.

Accelerating Machine Learning with SageMaker Jumpstart

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Machine learning (ML) projects can be complex, time-consuming, and resource-intensive. Amazon SageMaker Jumpstart aims to change that by providing pre-built solutions, pre-trained models, and end-to-end ML capabilities.

Understanding the AWS Well-Architected Framework

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The AWS Well-Architected Framework is more than just a set of best practices; it’s a blueprint for success in the cloud.

Mastering Advanced Networking in EKS and Kubernetes

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Kubernetes has revolutionized container orchestration, and Amazon’s Elastic Kubernetes Service (EKS) is one of the most popular managed Kubernetes solutions available today.

How to Ignore SSL Certificates Globally in Git

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In the world of software development, Git is an indispensable tool for version control.

Semantic Versioning with npm

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Semantic Versioning, often referred to as SemVer, is a crucial convention within the Node.

Understanding Peer Dependencies in Node Modules

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When working with Node.js and managing packages for your projects, you’re likely familiar with the dependencies and devDependencies sections in a package.

How to Programmatically get Amazon IP Ranges/CIDRs

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Amazon Web Services (AWS) operates an extensive network infrastructure with a vast number of IP addresses and CIDR blocks.

The Ultimate Guide to Emacs: Mastering the Art of CLI Programming

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In the realm of command-line interface (CLI) programming, Emacs stands as a legendary text editor, known for its immense power and unparalleled extensibility.

The Ultimate Guide to VI: Mastering the Art of CLI Programming

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In the world of command-line interface (CLI) programming, efficiency is paramount.

AWS Assume to another role

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OUT=$(aws sts assume-role --role-arn arn:aws:iam::0123456789:role/OrganizationAccountAccessRole --role-session-name test) export AWS_ACCESS_KEY_ID=$(echo $OUT | cut -d '"' -f 6 ) export AWS_SECRET_ACCESS_KEY=$(echo $OUT | cut -d '"' -f 10 ) export AWS_SESSION_TOKEN=$(echo $OUT | cut -d '"' -f 14 ) aws sts get-caller-identity

Programming Languages Series

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1. Introduction Welcome to our Programming Languages Series! In this series, we’ll explore various programming languages, understand their purposes, provide code examples, and discuss when to use each one.

Docker Deep Dive Series

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1. Getting Started In this first part of the series, we will kick things off by getting Docker installed and running on your system.

Machine Learning Mastery Series

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Part 1. Introduction to Machine Learning Welcome to the Machine Learning Mastery Series, a comprehensive journey into the exciting world of machine learning.

Kubernetes Mastery

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Part 1. Introduction Welcome to the Kubernetes Mastery Series! In this first part, we’ll set up a Kubernetes cluster using KinD (Kubernetes in Docker).

Managing Multiple Environments with Terraform Workspaces

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Managing infrastructure across multiple environments such as development, staging, and production can be a daunting task.

Controlling and Understanding Parallelism Impact on the DAG

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When working with large-scale infrastructure deployments, managing the provisioning and orchestration of resources efficiently becomes crucial.

How to add Payment Subscriptions with Stripe in Django

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Integrating Stripe subscriptions into your Django site involves several steps. Here’s a high-level overview of the process.

Private Application Load Balancer for EKS in Terraform

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Amazon Web Services (AWS) provides a powerful combination of services for building, deploying, and managing applications.

Kubernetes vs Docker Swarm for Container Orchestration

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Container orchestration has become a cornerstone of modern application deployment and management.

Setting Comprehensive CI/CD Pipeline with Jenkins and Docker

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In today’s dynamic software landscape, the fusion of Continuous Integration and Continuous Deployment (CI/CD) pipelines with robust tools like Jenkins and Docker has emerged as a cornerstone of efficient and reliable application delivery.

Navigating Microsoft Azure for Seasoned AWS Experts

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In the ever-evolving landscape of cloud computing, two mammoth players, Amazon Web Services (AWS) and Microsoft Azure, have emerged as titans, offering an extensive array of services that cater to a diverse spectrum of business needs.

Navigating Google Cloud Platform (GCP) for AWS Experts

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In today’s rapidly evolving landscape of cloud computing, Amazon Web Services (AWS) and Google Cloud Platform (GCP) have emerged as prominent contenders, furnishing an extensive array of services tailored to cater to the dynamic requirements of modern businesses.

Create a slug from a name in MySQL/MariaDB

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How to create a slug from the name of an item in MySQL/MariaDB.

Secure Efficient Server Management with AWS Systems Manager

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In the ever-evolving landscape of cloud computing, AWS (Amazon Web Services) continually introduces innovative solutions to enhance operational efficiency, security, and ease of management.

How to Get a List of Available Regions from AWS CLI

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AWS (Amazon Web Services) is a prominent cloud service provider that offers a wide range of services to businesses and individuals worldwide.

[Solved] A Number After a Double Reversal in Python

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The problem Reversing an integer means to reverse all its digits.

Common Issues and Mastering Effective Debugging Techniques

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While Kubernetes offers a powerful platform for deploying containerized applications, managing complex clusters can sometimes lead to challenges and errors.

K8s CI/CD: GitOps with Jenkins, GitLab, Argo CD

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Continuous Integration and Continuous Deployment (CI/CD) pipelines are fundamental to the success of Kubernetes deployments , enabling fast and reliable application delivery.

K8s Monitoring & Logging: Best Practices & Top Tools

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Monitoring and logging are critical components of a successful Kubernetes deployment , providing insights into the health, performance, and behavior of your clusters and applications.

K8s Upgrades & Rollbacks Guide to Compatibility & Strategies

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Keeping your Kubernetes cluster up-to-date is crucial for security, performance, and accessing the latest features.

K8s Pod Scheduling: Node & Pod Affinity Demystified

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Efficient pod scheduling is essential to achieving high performance and resource utilization in a Kubernetes cluster.

Securing Kubernetes: Guarding Against Container Threats

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Kubernetes has become the de facto platform for deploying containerized applications , revolutionizing software development.

K8s Cluster Performance: Resource Optimization Guide

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Efficiently managing resources in a Kubernetes cluster is crucial to achieving peak performance and cost-effectiveness.

K8s Scaling Mastery: Manual, HPA & Metrics APIs

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Kubernetes has revolutionized application deployment by providing a scalable and efficient container orchestration platform.

K8s Storage Demystified: Persistent Volumes & Classes

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Kubernetes has become the go-to platform for deploying scalable, containerized applications.

K8s Networking: Pod Communication and Ingress Demystified

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Kubernetes has revolutionized the way we deploy and manage containerized applications .

React State Balancing: A Guide to State Management

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As React apps grow, managing shared and app-wide state can become challenging.

React + Node: Beginner's Guide to Full Stack Dev

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React excels at building fast, dynamic frontends. Node.js shines for server-side APIs and microservices.

Optimal React Patterns: Beginner's Guide

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As with any framework, React comes with its own set of best practices and optimal patterns.

Debugging React Apps: Beginner's Guide

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Bugs are inevitable in complex React applications. Thankfully, React provides great tools to squash bugs quickly.

Advanced React Patterns: Compound Components & More

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As React apps scale, you’ll want to structure components for greater reusability and composability.

React Animation Guide: Libraries and Techniques

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Animation brings interfaces to life. Thankfully, React has great open source libraries for animation.

Testing React Apps: Beginner's Guide to TDD

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Testing is crucial for ensuring React apps are stable and bug-free.

Data Fetched Fast - A Beginner's Guide to React Query

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Fetching data in React often means using stale state and complex caching logic.

Forms Simplified, A Beginner's Guide to Managing React Forms

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Forms are a common need for many React apps. However, managing form state and validation can be tricky.

Optimizing React Performance: Beginner's Guide

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As React apps grow, you may notice performance starting to lag - sluggish interactions, choppy animations, janky scrolling.

State Management 101 - A Beginner's Guide to React State

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State management is a crucial concept in React. State allows components to dynamically update UI based on data changes.

Accessible React Apps: Beginner's Guide to Accessibility

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Accessibility is an important consideration when building modern web apps. React provides useful tools to make accessible, inclusive products.

Mystery Boxes - A Beginner's Guide to React Fragments

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When returning multiple elements from a component’s render method, they must be wrapped in a single parent DOM node:

Unidirectional Data Flow in React: Beginner's Guide

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A key advantage of React is its unidirectional data flow. This makes the flow of data predictable, and helps avoid unexpected side effects from data changing unexpectedly.

Event Handling in React: Beginner's Guide

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Responding to user events is a crucial part of building interactive UIs.

Hooked on React - A Beginner's Guide to React Hooks

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When React was first released, class components were the standard way to build complex UIs.

Lifting State in React: Beginner's Guide

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As React apps grow in complexity, managing shared state between components can become tricky.

Looping in JSX with React Keys: Beginner's Guide

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Looping over arrays to render lists of elements is a common need in React apps.

Conditional Rendering in React

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In React apps, you’ll often need to render different UI components conditionally based on certain state.

Passing Data Between React Components with Props

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One of React’s core concepts is reusability through composable components. Components allow splitting complex UI into separate, reusable pieces.

Fostering DevOps Learning Culture: Lifelong Learning

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Introduction In the fast-evolving world of technology, where advancements and innovations are a constant, staying ahead of the curve is paramount for any DevOps team.

DevOps' Role in AI: Enhancing Intelligent Systems

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Introduction The world of technology is witnessing a remarkable fusion of two transformative disciplines: DevOps and Artificial Intelligence (AI).

DevOps and Microservices: Scalable, Agile Software Delivery

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Introduction In the fast-paced world of software development, two crucial methodologies have emerged as game-changers for modern development teams: DevOps and Microservices.

Nature-Inspired Problem Solving: Genetic Algorithms

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Introduction Genetic Algorithms (GAs) and Evolutionary Computation (EC) are powerful optimization techniques inspired by the process of natural selection and evolution.

Python Dynamic Programming: Mastering Optimization

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Introduction Dynamic programming is a powerful algorithmic technique that allows developers to tackle complex problems efficiently.

Python Reflection & Metaprogramming: Advanced Power

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Introduction Python is a versatile programming language that offers powerful features and capabilities.

Kubernetes ReplicaSets: Scalability & Fault Tolerance

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Introduction In Kubernetes, ReplicaSets are a vital resource that enables scalable and fault-tolerant deployments of pods.

Kubernetes Namespaces: Isolation & Resource Management

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Introduction In Kubernetes, namespaces provide a powerful abstraction that allows you to partition and isolate resources within a cluster.

K8s Cluster Resiliency: Advanced High Availability

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Introduction In today’s technology landscape, ensuring the resiliency and high availability of Kubernetes clusters is crucial for maintaining the availability of applications and business continuity.

K8s Networking Mastery: Advanced Cluster Communication

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Introduction Kubernetes has revolutionized container orchestration, enabling the efficient management of complex applications.

Blue-Green Deployments in Kubernetes: Production & DR

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Introduction In today’s fast-paced and highly competitive digital landscape, organizations strive to deliver seamless and uninterrupted services to their customers.

AWS Production-DR Failover: Advanced Strategies

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Introduction Implementing failover between a production (Prod) account and a disaster recovery (DR) account is a critical aspect of ensuring high availability and business continuity in AWS.

Python Context Managers Mastery: Resource Management

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Introduction Python context managers provide a convenient and reliable way to manage resources and ensure proper setup and teardown actions.

Python Decorators Mastery: Advanced Usage Guide

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Introduction Python decorators are a powerful feature that allows you to modify the behavior of functions or classes dynamically.

Python's Yield Mastery: Advanced Usage Guide

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Introduction Python’s yield statement is a powerful feature that allows you to create generator functions.

Python: Unleashing the Power of Simplicity and Versatility

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Getting Started with Python Python is a versatile and popular programming language known for its simplicity and readability.

Python's Advanced Features: Empowering Programmers

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Introduction: In the vast realm of programming, Python stands tall as a language that caters to developers of all levels.

Python's Yield: Unleashing Generator Magic

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Introduction Python, being a versatile language, offers numerous tools and features to streamline our coding experience.

GitOps Rising: Transforming DevOps for Streamlined Delivery

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Introduction In today’s fast-paced digital landscape, where businesses strive to deliver high-quality software products with agility and efficiency, DevOps practices have become indispensable.

Enhancing Security: How DevOps Mitigates Cyber Threats

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Introduction In today’s digital landscape, where cyber threats are prevalent and evolving, organizations must adopt robust security measures to safeguard their sensitive data and systems.

Site Reliability Engineering (SRE) in Modern Organizations

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Introduction In today’s fast-paced and technology-driven world, organizations heavily rely on digital services to deliver their products and serve their customers.

DevOps & DevSecOps: Bridging Dev-Security Gap

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Introduction In today’s fast-paced digital landscape, where software development cycles are becoming increasingly rapid and security threats are ever-present, organizations are seeking effective ways to align development and security practices.

Unleashing the Power: Lambda - A Killer Feature in AWS

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In the world of cloud computing, Amazon Web Services (AWS) has long been a dominant player, providing a comprehensive suite of services to meet the diverse needs of businesses.

Python vs Java Performance: Programming Powerhouses

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In the vast landscape of programming languages, Python and Java have emerged as titans, offering robust solutions for a wide range of applications.

Teach me the Basics of Data Science in Python

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An overview of Data Science in Python This is an overview of the basics of data science in Python.

How to Share a VPC from one AWS Account to Another

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To share a Virtual Private Cloud (VPC) from one AWS account to another, you can use the AWS Resource Access Manager (RAM) service.

[Solved] Set CloudWatch Logs role ARN in account settings

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The error message you mentioned, “CloudWatch Logs role ARN must be set in account settings to enable logging,” typically occurs when you’re trying to enable logging for an AWS service that requires a CloudWatch Logs role, but the necessary role hasn’t been set up or configured correctly in your account settings.

How to Create CloudFormation with Multiple Files

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To create a CloudFormation (CFN) stack with multiple files, you can follow these general steps:

Teach me Hashicorp Vault

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Introduction to Hashicorp Vault HashiCorp Vault is a popular open-source tool designed for securely storing and managing secrets, such as API keys, passwords, certificates, and other sensitive information.

How to Generate Terraform using a Bash Shell script

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To generate Terraform code using a Bash shell script, you can utilize Python within the script.

How to Generate Terraform using Python

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To generate Terraform code using Python, you can utilize the power of the language and various libraries to dynamically create and manipulate the Terraform configuration files.

Make EKS cluster private with NodeGroup access

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The Theory To make an Amazon Elastic Kubernetes Service (EKS) cluster private and allow nodes to join through a node group, you need to follow a few steps.

Which is the best language to use in DevOps

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In DevOps, there isn’t a single “best” language that universally applies to all situations.

How is Ansible different from Chef or Puppet

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Ansible, Chef, and Puppet are all popular configuration management and automation tools, but they differ in their approach and architecture.

Teach me the basics of Ansible

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Ansible is an open-source automation tool that allows you to manage and configure computer systems.

How do you create an EKS cluster using CloudFormation

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The steps to achieve this To create an Amazon Elastic Kubernetes Service (EKS) cluster using CloudFormation, you can follow these steps:

How to connect an API Gateway to Inline Lambda in Terraform

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To connect an API Gateway to an inline Lambda function using Terraform, you can follow these steps:

API Gateway to Inline Lambda in CloudFormation

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To connect an API Gateway to an inline Lambda function using CloudFormation, you can follow these steps:

How to connect an API Gateway to Lambda in CloudFormation

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To connect an API Gateway to a Lambda function using CloudFormation, you can follow these steps:

Create DynamoDB Table & Add Items using Python 3 from Lambda

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To create a DynamoDB table and add items to it using Python 3 from AWS Lambda, you can use the AWS SDK for Python, also known as Boto3.

How to create a Site-to-Site VPN in Boto3 Python

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To create a site-to-site VPN using the Boto3 library in Python, you can utilize the boto3.

How to create a Site-to-Site VPN in Terraform

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To create a site-to-site VPN using Terraform, you can use the aws_vpn_gateway and aws_vpn_connection resources from the AWS provider.

How to create a Site-to-Site VPN in CloudFormation

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To create a site-to-site VPN (Virtual Private Network) using AWS CloudFormation, you can use the AWS::EC2::VPNGateway and AWS::EC2::VPNConnection resources.

How to AWS sts assume role in one command - without jq

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The issue - what it takes to assume a role To assume an AWS role in the CLI, you will have to do something like this:

How to create a Lambda in CloudFormation

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You can create a Lambda in CloudFormation as follows: Option 1 - Inline code Resources: MyLambdaFunction: Type: AWS::Lambda::Function Properties: FunctionName: MyLambdaFunction Runtime: python3.

How to create a Lambda in Terraform

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To create an AWS Lambda function using Terraform, you need to define the necessary resources in a Terraform configuration file.

How to create a Bastion server in Terraform

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To create a Bastion server using Terraform, you need to define the necessary resources in a Terraform configuration file.

How to create a Bastion server in CloudFormation

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To create a Bastion server using AWS CloudFormation, you need to define the necessary resources in a CloudFormation template.

How to you create a Cross Account Role in Terraform

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To create a cross-account role in Terraform, you need to perform the following steps:

How to you create a Cross Account Role in CloudFormation

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To create a cross-account role in CloudFormation, you can follow these steps:

How to create Public and Private Subnets in CloudFormation

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To create public and private subnets in AWS CloudFormation, you can use the AWS CloudFormation Template Language (CFT) to define your network configuration.

How to create Public and Private Subnets in Terraform

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To create public and private subnets in Terraform, you can use the AWS provider to define your network configuration.

Create Internet Gateway & Assign to EC2 in CloudFormation

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To create an Internet Gateway and associate it with an EC2 instance using AWS CloudFormation, you can follow these steps:

Create Internet Gateway & Assign to EC2 in Terraform

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To create an Internet gateway and assign it to an EC2 instance using Terraform, you can follow these steps:

How to configure Terraform to use Local Providers from Nexus

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If your organization has blocked registry.terraform.io and has instead downloaded the provider binaries to Nexus, then you can do the following to still make your Terraform execute correctly.

[Solved] Fargate Can't Read Secrets from Secret Manager

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If you’re running a Fargate task and it’s not able to read secrets from AWS Secret Manager, there are a few things you can check:

Golang vs Python: The Ultimate Battle in DevOps

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In the world of DevOps, two programming languages are often pitted against each other: Golang and Python.

Why DevOps and Python are Amazing Together

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In today’s software development world, DevOps and Python are two of the most essential elements for building high-quality software.

Python & DevOps: Transforming Software Development

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Introduction: In recent years, the software industry has witnessed a remarkable shift towards DevOps and Python.

DevOps: The Ultimate Secret Weapon for High-Tech Success

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DevOps has been a buzzword in the tech industry for some time now.

How to Deploy a Java Application in AWS ECS using Terraform

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In order to deploy a Java application into AWS ECS (Elastic Container Service) using Terraform, we need to consider a few different things.

How to set the Hostname on a Linux server with Terraform

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If you need to set the hostname on a linux server, and you are using Terraform, then you can do the following:

What are the different types of AWS API Gateway Protocols?

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Amazon API Gateway supports various protocols for exposing APIs, including:

IaC: A Guide to Modern Software Development

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In the world of software development, efficiency, scalability, and repeatability are paramount.

DevOps and Microservices: How They Complement Each Other

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In today’s fast-paced world of software development, DevOps and microservices have emerged as two powerful methodologies that enable organizations to build and deploy applications with speed, agility, and reliability.

IaC Unlock: Maximize Potential with Ansible

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In today’s fast-paced world of software development and IT operations, the need for efficient and scalable infrastructure management has become more critical than ever.

GitOps: Managing Infrastructure as Code with Git

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Introduction In today’s fast-paced world of software development and operations, managing infrastructure efficiently and securely is crucial for organizations to deliver reliable and scalable applications.

DevOps Synergy: Boosting Cybersecurity

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As organizations increasingly rely on technology to power their operations, the need for robust cybersecurity measures becomes more critical than ever.

The Role of DevOps in Blockchain

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Blockchain technology is gaining traction across various industries for its ability to provide transparency, security, and immutability.

The Importance of Testing in DevOps: Strategies and Tools

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Introduction In today’s fast-paced digital world, software development has become an essential part of business operations.

DevOps Impact on Customer Experience

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DevOps has revolutionized the way organizations develop, deploy, and manage software applications.

Building a DevOps Culture from the Ground Up

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DevOps has become a crucial aspect of software development, enabling teams to deliver software more efficiently and with higher quality.

Scaling DevOps for Enterprise Organizations

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Introduction DevOps has become a popular approach for software development in recent years, enabling teams to collaborate more effectively, increase efficiency, and deliver high-quality software faster.

The Benefits of Infrastructure as Code in DevOps

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Introduction The increasing complexity of software systems requires a flexible, scalable, and reliable infrastructure.

DevOps for Legacy Systems: Challenges and Solutions

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As organizations continue to evolve and embrace digital transformation, they often encounter legacy systems that are critical to their business operations.

DevOps Risk Management: Security & Compliance

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DevOps has transformed software development, enabling teams to build, test, and deploy applications faster and more efficiently.

Why DevOps is Critical for Digital Transformation

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Digital transformation is the process of adopting and implementing digital technologies to improve business operations, increase efficiency, and enhance customer experience.

The Role of Microservices in DevOps

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In recent years, microservices have become a popular architectural style for building software applications.

Achieving Continuous Delivery with DevOps and Automation

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Continuous delivery is a DevOps practice that aims to automate the entire software delivery process, from code commit to production deployment.

The Importance of Collaboration in DevOps Culture

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Collaboration is a key aspect of DevOps culture, and it plays a crucial role in driving success and delivering value to customers.

Cloud-Native: Key to DevOps Success

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In recent years, cloud-native architecture has become a buzzword in the world of DevOps.

10 Best Practices for Continuous Integration in DevOps

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Continuous Integration (CI) is an essential part of modern software development and is integral to the DevOps methodology.

DevOps vs. Agile: What's the Difference and Why it Matters

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Introduction In the world of software development, there are two methodologies that are often mentioned: Agile and DevOps.

The Future of DevOps: Emerging Trends and Technologies

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In recent years, DevOps has emerged as a key practice for modern software development, helping organizations to achieve faster delivery of high-quality applications.

Building Resilient Microservices with Istio and Envoy

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As microservices architecture continues to grow in popularity, it’s becoming increasingly important to ensure that these distributed systems are reliable and resilient.

The Role of DevSecOps in Modern Software Development

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As the world becomes increasingly digital, software development has become a critical aspect of business success.

5 Key Metrics to Measure DevOps Success

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As DevOps continues to gain popularity and adoption, it is important for organizations to measure the success of their DevOps initiatives.

The Importance of Infrastructure as Code in DevOps

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Infrastructure as Code (IaC) is a methodology that involves managing and provisioning infrastructure through code rather than manually configuring hardware and software components.

How to Build a Successful DevOps Toolchain

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DevOps toolchains are essential for streamlining software delivery and ensuring that teams can work efficiently and collaboratively.

Scaling DevOps: Strategies for Managing Large Teams

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DevOps has revolutionized software development and delivery, enabling teams to work collaboratively, automate processes, and deliver software faster and more reliably.

Why DevOps Culture is Critical for Business Success

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The DevOps movement has been gaining momentum in recent years as organizations realize the benefits of breaking down silos between development and operations teams.

The Ultimate Guide to Kubernetes Deployment Strategies

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Kubernetes has become a popular choice for container orchestration, providing developers with a powerful platform for deploying, scaling, and managing containerized applications.

10 Best Practices for Container Security in DevOps

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Containers have become a critical component of modern software development practices.

How to Implement CI/CD Pipelines with Jenkins

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Continuous Integration and Continuous Deployment (CI/CD) pipelines are critical components of modern software development practices.

[Solved] AWS Error: TooManyBuckets - Bucket Limit Exceeded

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If you get the following error: │ Error: creating Amazon S3 (Simple Storage) Bucket (<your-bucket-name): TooManyBuckets: You have attempted to create more buckets than allowed │ status code: 400, request id: 0P1TV2VCEDKGFQNY, host id: gc9di71ONabECoBYkkzc7Lmqs0DOo2DVhV2kqCgNruNO6Okm5K3EXzosdf5MCxP8uI= │

How to check if a program exists from a Bash/Shell script

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You can look to use: command -v <the_command> There are also 2 other ways, that we will run through a little further down, but for now.

The DevOps Culture

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DevOps is a software development approach that emphasizes collaboration and communication between development and operations teams.

Teach me Kubernetes - Part 7 - Sidecar Containers

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a sidecar container is a secondary container that runs in the same Pod as the primary container.

Teach me Kubernetes - Part 6 - Deployments

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a Deployment is a higher-level abstraction that manages the deployment and scaling of a set of Pods.

Teach me Kubernetes - Part 5 - Services

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a Service is an abstraction that provides a stable, IP address and DNS name for a set of Pods.

Teach me Kubernetes - Part 4 - Replication Controllers

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a ReplicationController (also known as a “ReplicaSet” in newer versions of Kubernetes) is a controller that ensures that a specified number of replicas of a Pod are running at any given time.

Teach me Kubernetes - Part 3 - Pods

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a Pod is the smallest and simplest unit in the cluster.

Teach me Kubernetes - Part 2 - Nodes

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Looking for the entire 7 part guide? Start at the Overview In Kubernetes, a Node is a worker machine that runs containerized applications.

Teach me Kubernetes - Part 1 - Overview

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Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.

How to Create a Simple Chatbot in Python

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This is a simple chatbot in Python using the NLTK library.

Create Transit Gateway with Attachments in Terraform

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The following example Terraform code snippet creates a Transit Gateway with VPC and VPN attachments:

How to Create an AWS EC2 Instance in Terraform

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The following Terraform code snippet creates an EC2 instance for you.

A Primer on Terraform Concepts

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Terraform is an open-source tool for building, changing, and versioning infrastructure safely and efficiently.

How to Learn Recursion by Example in Python

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Here’s an example code in Python that demonstrates recursion: def factorial(n): if n == 0: return 1 else: return n * factorial(n-1) print(factorial(5)) # Output: 120 This code defines a function factorial that calculates the factorial of a given number n.

Understanding Site Reliability Engineering (SRE)

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Site Reliability Engineering (SRE) can also help organizations to be more proactive in identifying and addressing potential issues before they become major problems.

What is DevOps?

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DevOps is a term that combines “development” and “operations.” It is a methodology that aims to bridge the gap between the software development and IT operations teams.

How to Create a Password Generator in Golang

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Introduction In today’s digital age, password security is more important than ever before.

How does Disaster Recovery work in the Cloud?

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Disaster Recovery (DR) in the cloud refers to the process of recovering IT infrastructure and data in the event of a disaster, such as a natural disaster or a cyber attack, in a cloud environment.

What is DevOps and why is it important?

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DevOps is a software development methodology that emphasizes collaboration and communication between software developers and IT operations teams.

What is the Zen of Python?

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The Zen of Python is an Easter Egg that long time Pythoneer (Tim Peters) channeled the guiding principals for the language’s design principals into 20 aphorisms, of which only 19 of them are written down.

Bash: Convert HTML to Markdown Recursively with Pandoc

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You can recursively convert all your HTML files to Mardown format in Bash, by using Pandoc.

How to Create a Password Generator in C++

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You can easily create a password generator in C++ with the following simple method.

How do you architect Disaster Recovery in AWS?

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Disaster recovery (DR) in AWS involves creating a plan and set of procedures to help your organization recover from a catastrophic event, such as a natural disaster, power outage, or cyber attack, that could impact your business operations.

What options exist for Infrastructure as Code (IaC)

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There are several options for Infrastructure as Code (IaC) tools that can help automate the provisioning and management of infrastructure resources, such as servers, networks, and storage, in a reliable and reproducible way.

How to learn Java in 1 day

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Learning Java in one day is not a realistic goal, as Java is a complex programming language that requires time and practice to master.

How to read user input as numbers in Python

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In Python 3 onwards, the input function returns a string type.

Capitalize First Letter of Each Word in Python

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If you have a sentence containing multiple words, and you want each of the words to start with a capital letter, then you can do one of the following:

How to Create a Password Generator in Python

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You can easily create a password generator in Python with the following simple method.

How to Convert Bytes to a String in Python

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If you need to convert bytes to a string in Python, then you can do the following:

How to measure the elapsed time in Python

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Option 1 - using the time module import time start = time.

How to Change a MariaDB/MySQL Data Directory to a New Location on Linux

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Step 1 — Moving the MariaDB Data Directory mysql -u root -p select @@datadir; Output: +-----------------+ | @@datadir | +-----------------+ | /var/lib/mysql/ | +-----------------+ 1 row in set (0.

[Solved] Docker Daemon Connection Error: Daemon Running?

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If you get the following error when trying to run a Docker container:

[Solved] M1 Docker Image Platform Mismatch with Host (ARM64)

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If you get the following error when trying to run a Docker container that was built on an M1 mac:

How to get the SHA512 sum of a string using Python

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If you need to get the SHA512 sum of a string using Python, then you can do the following.

How to get the SHA256 sum of a string using Python

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If you need to get the SHA256 sum of a string using Python, then you can do the following.

How to get the MD5 sum of a string using Python

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If you need to get the MD5 sum of a string using Python, then you can do the following.

[Solved] TypeError: datetime Not JSON Serializable

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If you get the following error: TypeError: Object of type datetime is not JSON serializable

How to Return a List of All AWS Lambda Function Names in CLI

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If you would like to list all AWS Lambda Function Names in your CLI using the AWS CLI, then you can do this:

How much faster is Python code?

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The speed of Python code compared to other programming languages depends on a variety of factors, such as the specific task being performed, the libraries and frameworks used, the quality of the code implementation, and the hardware on which the code is executed.

Zip & Encode Dict to String & Back in Python

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If you have a Python dictionary, and want to encode it as a string and zip it to save space, perhaps for passing a dictionary through as an environment variable or similar, then you can do the following

What Categories of Websites are there?

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There are many different categories of websites, but here are some of the most common:

How to Generate a Random Number between 2 numbers in Python

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If you need to generate a random number between two (2) numbers in Python, then you can make use of the random module.

How to Install AWS SAM CLI on Mac

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If you need to install AWS SAM CLI on a Mac, then the easiest option is to use Homebrew with the following commands:

How to count the amount of rows in MariaDB fast

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If you need to find the fastest way to count the number of rows in a massive MariaDB, or MySQL table, then you can do the following instead of performing a select count() query:

How to find the Product of Consecutive Fib Numbers in Python

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0, 0, 1, 0, 2, 0, 2, 2, 1, 6, 0, 5, 0, 2, 6, 5, 4, 0, 5, 3, 0, 3, …

How to Solve Van Eck's Sequence in Python

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0, 0, 1, 0, 2, 0, 2, 2, 1, 6, 0, 5, 0, 2, 6, 5, 4, 0, 5, 3, 0, 3, …

How to Solve: Help the Bookseller Challenge in Python

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A bookseller has lots of books classified in 26 categories labeled A, B, … Z.

How to solve AWS MediaPackage PackagingGroup Quota Limit

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If you are using AWS Elemental MediaPackage and hit the following error, then you need to either do one of the following:

How to Run Cdk Bootstrap

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To bootstrap an AWS CDK environment, you simply need to do the following:

How to Get Account Number from AWS Lambda

If you need to get the current Account Number, or Account ID from within a Lambda execution, then you can access invoked_function_arn from the context and return the associated value as follows:

Summary of the Frequently Used AWS STS API calls

AssumeRole – is useful for allowing existing IAM users to access AWS resources that they don’t already have access to.

Understanding Locking and Conditional Writes in AWS DynamoDB

Optimistic locking is a strategy to ensure that the client-side item that you are updating (or deleting) is the same as the item in DynamoDB.

AWS CodeDeploy Deployment Type Options

CodeDeploy provides two (2) deployment type options: Option 1 – In-place Deployment In-place deployment: The application on each instance in the deployment group is stopped, the latest application revision is installed, and the new version of the application is started and validated.

Defining Amazon ECS Task Placement Strategies

Amazon ECS supports the following task placement strategies: binpack – Place tasks based on the least available amount of CPU or memory.

Deployment methods in AWS Elastic Beanstalk

– All at once – Deploy the new version to all instances simultaneously.

How to update NTP to sync clock on Linux

If you need to sync the clock on Linux using the central NTP clock service, you can do the following:

How to Find IP Address Ranges used by Amazon S3

You can query the ip-ranges Amazon AWS URL, and parse the results through jq as follows:

How to Find the nth Reverse Number in Java

The challenge Reverse Number is a number which is the same when reversed.

How to Find the Sum of Intervals in Java

The challenge Write a function called sumIntervals/sum_intervals() that accepts an array of intervals, and returns the sum of all the interval lengths.

How to Find the Stray Number in Python

The challenge You are given an odd-length array of integers, in which all of them are the same, except for one single number.

How to Find the EDID UUID of External Mac Monitors

You can issue the following command on an Apple Mac’s terminal to show the EDID UUID (unique serial number) of all attached external monitors:

[Solved] jsii.errors.JSIIError: docker exited with status 1

If you get the following error while running AWS CDK:

How to Filter a Number in C

The challenge The number has been mixed up with the text.

How to Take a Ten Minute Walk in C

The challenge You live in the city of Cartesia where all roads are laid out in a perfect grid.

How to Count Stats of a String in C

The challenge You will be given a string and your task will be to return a list of ints detailing the count of uppercase letters, lowercase, numbers and special characters, as follows.

How to Convert a String to the NATO Phonetic Alphabet in C

The challenge You’ll have to translate a string to Pilot’s alphabet (NATO phonetic alphabet).

How to Add 1 to the Value of each Array in C

The challenge Given an array of integers of any length, return an array that has 1 added to the value represented by the array.

How to Calculate the Sum of a Sequence in C

The challenge Your task is to make function, which returns the sum of a sequence of integers.

How to Solve the Sum of Triangular Numbers in C

The challenge Your task is to return the sum of Triangular Numbers up-to-and-including the nth Triangular Number.

How to Determine if a String Only Contains Unique Characters in C

The challenge Write a program to determine if a string contains only unique characters.

How to Find the Maximum Multiple in C

The challenge Given a Divisor and a Bound , Find the largest integer N , Such That ,

How to Assign a Digital Cypher in C

The challenge Digital Cypher assigns to each letter of the alphabet unique number.

How to Check for All Inclusive in C

The challenge Input: a string strng an array of strings arr Output of function contain_all_rots(strng, arr) (or containAllRots or contain-all-rots):

How to Solve for Factorial in C

The challenge In mathematics, the factorial of a non-negative integer n, denoted by n!

How to Create an Incrementer in C

The challenge Given an input of an array of digits, return the array with each digit incremented by its position in the array: the first digit will be incremented by 1, the second digit by 2, etc.

How to Return the Closest Number Multiple of 10 in C

The challenge Given a number return the closest number to it that is divisible by 10.

How to Reverse Every Other Word in a String in C

The challenge Reverse every other word in a given string, then return the string.

How to Solve Simple Beads Count in C

The challenge Two red beads are placed between every two blue beads.

How to Solve the Maze Runner in C

The challenge Introduction Welcome Adventurer. Your aim is to navigate the maze and reach the finish point without touching any walls.

How to Take a Number and Sum It’s Digits Raied to the Consecutive Powers in C

The challenge The number 89 is the first integer with more than one digit that fulfills the property partially introduced in the title of this challenge.

How to Find the Middle Element in C

The challenge You need to create a function that when provided with a triplet, returns the index of the numerical element that lies between the other two elements.

How to Invite More Women in C

The challenge Task King Arthur and his knights are having a New Years party.

How to Build a Tower in C

The challenge Build a pyramid-shaped tower, as an array/list of strings, given a positive integer number of floors.

How to Calculate A Rule of Divisibility by 7 in C

The challenge A number m of the form 10x + y is divisible by 7 if and only if x − 2y is divisible by 7.

How to Categorize a New Member in C

The challenge The Western Suburbs Croquet Club has two categories of membership, Senior and Open.

How to Solve Deodorant Evaporator in C

The challenge This program tests the life of an evaporator containing a gas.

How to Find the Divisors in C

The challenge Create a function named divisors/Divisors that takes an integer n > 1 and returns an array with all of the integer’s divisors(except for 1 and the number itself), from smallest to largest.

Solving Love vs Friendship in C

The challenge If　a = 1, b = 2, c = 3 .

How to Bounce Balls in C

The challenge A child is playing with a ball on the nth floor of a tall building.

How to Find the Capitals in C

The challenge Instructions Write a function that takes a single string (word) as argument.

How to Empty and Delete an S3 Bucket using the AWS CLI

Option 1 – Using AWS CLI Step 1 export bucketname='your-bucket-here' Step 2

What ports to open for FSx connection to AWS Managed Active Directory

If you are creating a FSx file system, and want to connect it to AWS Managed Active Directory, then you will need to create a VPC Security Group with the following ports:

How to Calculate Variance in Python

If you need to calculate variance in Python, then you can do the following.

How to Calculate the Sum of a List in Python

If you need to calculate and get the sum of a list in Python, then you can do the following.

How to add a List to a Set in Python

If you need to add a list to a set in Python, then you can do the following:

How to Remove Punctuation from a List in Python

If you have a Python list, and want to remove all punctuation, then you can do the following:

How to Normalize a List of Numbers in Python

If you need to normalize a list of numbers in Python, then you can do the following:

How to Multiply a List by a Scalar in Python

If you need to multiply a list by a scalar in Python, then you can do one of the following:

How to Find the Index of the Minimum Element in a List in Python

If you need to find the index of the minimum element in a list, you can do one of the following:

How to Convert a Set to a String in Python

If you need to convert a set to a string in Python, then you can do one of the following:

How to Decrement a Loop in Python

If you need to decrement a loop in Python, then you can do the following:

How to Create Zip Archive of Directory in Python

If you need to create a zip of a directory using Python, then you can do the following:

How to Remove the Last Character of a String in PHP

If you need to remove the last character of a string in PHP, then you can do the following:

How to Create Function with Multiple Returns in PHP

If you need to create a PHP function that returns multiple values, then you can do one of the following.

How to Download a File in NodeJS without any Third Party Libraries

If you need to download a file in NodeJS without using any third party libraries, then you can do the following.

How to Execute a Shell Script in NodeJS

If you need to execute a shell script in NodeJS, then you can use the exec keyword.

How to Print Multiple Arguments in Python

If you need to print out multiple arguments using Python, then you can do one of the following:

How to Delete all Resources Except One in Terraform

If you need to delete all resources created by Terraform, except for a single, specific one, then you can do the following:

How to Copy Files between Two Nodes using Ansible

If you need to copy files between two (2) nodes, using Ansible, then you can do the following:

How to Delete Files and Folders in a Directory using Ansible

If you need to delete files and folders in a directory using Ansible, then you can do the following:

How to Copy Multiple Files with Ansible

If you need to copy multiple files using Ansible, then you can do the following:

How to Write Multiline Shell Scripts in Ansible

If you need to write a shell script in Ansible, you probably have something like this:

How to Pass Variables to Ansible Playbook CLI

If you need to pass a variable to Ansible playbook, using the command line, then you can do the following:

How to Create a Directory using Ansible

If you need to create a directory using Ansible, then you can do the following:

How to Disable Screensaver on Mac using the CLI

If you want to disable the Screensaver on your Mac, by using the Command Line Interface (CLI), then you can do the following:

How to Remove Old and Unused Docker Images

If you need to remove any old and unused Docker images, then you can do the following:

How to Convert Milliseconds to Date in Javascript

If you need to convert Milliseconds to Date in Javascript, then you can do the following:

How to Convert String to Title Case in Javascript

If you need to convert a String to Title Case in Javascript, then you can do one of the following:

How to Compile Multiple Java Files from a Single Command in Java

If you need to compile multiple Java files using a single command, then you can do the following.

How to Convert JSON to a Java Object

If you need to convert JSON to a Java Object, then you can do one of the following:

How to Calculate Powers of Integers in Java

If you need to calculate the powers of Integers in Java, then you can do one of the following:

How to Get Today’s Date in Java

If you need to get today’s date in Java, then you can do one of the following:

How to Copy Files from Docker Container to Host

If you need to copy files from a Docker Container to the Host, then you can do one of the following:

How to Get the IP Address of a Docker Container

If you need to get the IP Address of a Docker Container, then you can do the following:

How to Convert Time to String in Golang

If you need to convert Time to a String in Go, then you can do one of the following:

How to Perform a Deep Copy in Golang

To perform a Deep Copy in Go, you can use a struct type as follows:

How to Return Lambda Functions in Golang

Go doesn’t typically have Lambda Expressions, but synonymous to Lambdas, or Closures if Anonymous Functions for Go.

How to Create an Empty Slice in Golang

If you would like to create an empty slice in Go, then you can do the following:

How to Parallelize a for Loop in Python

If you need to run a for loop in parallel, then you can do one of the following:

How to Reverse an Integer in Python

If you need to reverse an integer using Python, then you can do the following:

How to Save a Python Dictionary to a File in Python

If you need to save a Python Dictionary object type to a file using Python, then you can do one of the following:

How to Move Files From One Directory to Another Using Python

If you need to move files from one directory to another directory, using Python, then you can do one of the following:

How to Get the Number of Lines in a File in Python

If you need to get the number of lines in a file, or the line count total from a file, using Python, then you can use one of the following options:

How to Read Specific Lines From a File in Python

If you need to read a specific line from a file using Python, then you can use one of the following options:

How to Get All Files in a Directory in Python

If you need to get all the files in a directory using Python, then you can do the following:

[Solved] dial tcp: lookup proxy.golang.org: i/o timeout

If you get a timeout when trying to install go dependencies, the error may look something like this:

How to Check Operating System in Python

If you need to check the Operating System information from Python, then you can do one of the following:

How to Convert Hex to Byte in Python

If you need to convert Hex to Byte in Python, then you can do one of the following:

[Solved] fatal: Could not read from remote repository with Git

If you receive the following error when trying to clone a Git repository:

How to Install Homebrew on a Mac

Prerequisites You should have some familiarity with the Mac Terminal application since you’ll need to use it to install Homebrew.

How to create an AWS EC2 instance in CloudFormation

Create an EC2 Instance in CloudFormation If you need to create an EC2 instance in CloudFormation, then you can do the following:

How to Run Commands on an AWS ECS Cluster Task or Container

If you need to run a command, or set of commands on an AWS ECS cluster container, then you can do the following:

Understanding the Network Modes in AWS ECS

If using the EC2 launch type, the allowable network mode depends on the underlying EC2 instance’s operating system.

How to Enable ContainerInsights on AWS ECS from the AWS CLI

If you need to enable Container Insights for an ECS cluster, by using the AWS CLI, then you can do the following:

AppMesh and ECS with Imported ACM certificates on Envoy Sidecar through EFS

Summary This guide showcases the ability to use imported certificates from a third party provider (e.

How to Increase the disk size on a Cloud9 instance

If you need to increase the disk size of a Cloud9 instance, you can run the following script directly from the terminal in Cloud9:

How to Get the Instance Profile attached to an AWS EC2

If you need to get the IAM Role information from the attached EC2 role directly, you can do the following:

How to Create an AWS ECR Repository in AWS CLI

If you need to create an Elastic Container Registry (ECR) Repository from the AWS CLI, you can do the following:

How to Scale Out an AWS ECS Service

When you create the Amazon ECS service, it includes three Amazon ECS task replicas.

How to Retrieve AWS ECS Cluster Information

For more information about the Amazon ECS cluster, run the following command.

Types of communication in Amazon EKS

There are multiple types of communication in Amazon EKS environments.

[Solved] Read timeout on endpoint URL: “https://lambda.[region].amazonaws.com/2015-03-31/functions/[function-name]/invocations”

If you get the following error: Read timeout on endpoint URL: "https://lambda.

How to Remove a Passphrase from Certificate Key

If you have a Certificate Key that includes a Passphrase and you need to remove it, potentially to use it with AWS App Mesh, then you can do the following:

How to get Python logger to Print to std out

If you use Python’s logger as follows: import logging logger = logging.

How to Convert a String to an Integer in C

If you need to convert a String to an Integer in C, then you can do one of the following:

How to Convert an Integer to a String in C

If you need to convert an Integer to a String in C, then you can do one of the following:

How to append to an Array in Elasticsearch using elasticsearch-py

If you are using the Official ElasticSearch Python library (Docs), and you want to create an index:

How to Copy Text to the Clipboard in Python

If you need to Copy Text to the Clipboard using your Python application code, then you can do the following:

How to Read a PDF file in Python

If you need to read a PDF (Portable Document Format) file in your Python code, then you can do the following:

How to Convert HEX to RBG in Python

If you need to convert HEX (Hexadecimal) to RGB (Red-Green-Blue) in your Python code, then you can do the following:

How to Refer to a Null Object in Python

If you need to refer to a Null Object in your Python code, then you can do the following.

How to Convert Bytearray to String in Python

If you need to convert a Bytearray to a String in Python, then you can do the following:

How to get the Hostname in Python

If you need to get the Hostname in your Python application, then you can do the following:

How to get the IP Address in Python

If you need to get the IP Address in your Python application, then you can do the following:

How to use SSH in your Python application

If you need to make an SSH connection and issues commands over SSH using your Python application, then you can do the following:

How to Pause a Program in Python

If you need to pause the execution of your Python program, then you can do the following:

How to Convert String to Double in Python

If you need to convert a String to a Double in your Python code:

How to a Run Bash Command in Python

If you need to run a bash command in your Python code, then you can do the following:

How to Force Redeployment of AWS API Gateway using AWS CloudFormation

If you have an AWS API Gateway resource, and need it to force a redeployment using CloudFormation, then you can use the TIMESTAMP trick.

How to Deploy React App to S3 and CloudFront

If you would like to deploy a React App to AWS S3 and AWS CloudFront, then you can follow this guide.

[Solved] export ‘Switch’ (imported as ‘Switch’) was not found in ‘react-router-dom’

In react-router-dom v6, Switch is replaced by routes Routes. You need to update the import from:

How to List all Files/Folders/Directories in Python

If you need to list all Files, Folders, or Directories in Python code, then you can use the listdirs method from the os package.

How to Read a File in Python

If you need to read a file in Python, then you can use the open() built-in function to help you.

How to Drop Columns in Pandas Only If Exists

If you have a Pandas DataFrame, and want to only drop columns if they exist, then you can do the following:

[Solved] An error occurred while calling o86.getDynamicFrame. Exception thrown in awaitResult:

If you are running a GlueJob in AWS and get the following error:

AWS CDK Commands

The AWS Cloud Development Kit (CDK) comes with a list of commands that you need to know:

How to Make a Java Jar File Executable

Let’s say you have a Java project as follows: package ms.

How to List All Resources in an AWS Account

If you need to see a list of all the resources in your AWS Account, then you need to look into the Tag Editor.

Fixed size left column and fluid right column both with 100% height in CSS

If you need two (2) columns and want the left column to be a fixed size, but the right column to automatically take the remaining size of the window, then you can use the following solution.

How to Check if a Volume is Mounted in Bash

If you need to check if a volume is mounted in a Bash script, then you can do the following.

How to Determine if a Bash Variable is Empty

If you need to check if a bash variable is empty, or unset, then you can use the following code: