All Posts

Browse all our DevOps articles, tutorials, and guides

Terraform
2025-08-10|5 min read

How to Create a Folder in an AWS S3 Bucket Using Terraform

Learn how to create a folder in an AWS S3 bucket using Terraform by leveraging the `aws_s3_object` resource.

Terraform
2025-06-20|5 min read

How to Use the AWS account_id Variable in Terraform

Learn how to dynamically retrieve and use the AWS account_id variable in Terraform for your configurations.

Kubernetes
2025-06-01|5 min read

Command to Delete All Pods in All Kubernetes Namespaces

Learn how to delete all Pods across all namespaces in Kubernetes using a single command. Understand the implications and best practices for this operation.

Terraform
2025-06-01|5 min read

Terraform Conditionals: Handling Non-Existent Variables

Learn how to use Terraform conditionals to handle cases where a variable does not exist or is not defined.

Docker
2025-05-18|7 min read

How Docker Differs from a Virtual Machine (And Why It Matters)

Containers and virtual machines both isolate environments, but they work in very different ways. This guide explains the key differences and when to use each.

Docker
2025-05-04|7 min read

How to Copy Docker Images Between Hosts Without a Repository

Learn how to transfer Docker images directly between machines when a container registry is unavailable or impractical.

Docker
2025-05-03|6 min read

How to Access a Docker Container's Shell

Learn various ways to get shell access to your Docker containers for debugging, configuration, and maintenance tasks.

Docker
2025-05-02|8 min read

Understanding the Difference Between CMD and ENTRYPOINT in Dockerfiles

Learn how CMD and ENTRYPOINT instructions work, how they interact with each other, and when to use each one for more flexible Docker containers.

Docker
2025-05-01|7 min read

How to Copy Files from Docker Containers to the Host Machine

Learn efficient ways to extract and retrieve files from your running or stopped Docker containers to your host filesystem.

Kubernetes
2025-04-25|8 min read

How Can I Trigger a Kubernetes Scheduled Job Manually?

Learn how to manually trigger a Kubernetes Scheduled Job to run on demand. Understand the steps, commands, and best practices for this operation.

Docker
2025-04-21|5 min

Connecting to Host Machine's Localhost from a Docker Container

Learn how to properly connect to services running on your host machine from within Docker containers

Docker
2025-04-20|6 min

Understanding the Difference Between COPY and ADD in Dockerfiles

Learn when to use COPY vs ADD instructions in your Dockerfiles for better security and build performance

Kubernetes
2025-04-15|8 min read

Namespace "Stuck" as Terminating: How Do I Remove It?

Learn how to resolve the issue of a Kubernetes namespace stuck in the Terminating state. Understand the causes and steps to fix it.

Kubernetes
2025-04-05|6 min read

How to Switch Namespace in Kubernetes

Learn how to switch between namespaces in Kubernetes using kubectl commands and configuration files. Understand the importance of namespaces and practical examples.

Kubernetes
2025-03-30|6 min read

How Do I Force Kubernetes to Re-Pull an Image?

Learn how to force Kubernetes to re-pull container images to ensure your Pods use the latest version. Understand the steps and implications of this operation.

Terraform
2025-03-21|6 min read

Best practices when using Terraform?

Discover essential best practices for using Terraform to manage your infrastructure effectively and securely.

Terraform
2025-03-20|5 min read

How to create an SSH key in Terraform?

Learn how to generate and manage SSH keys in Terraform for secure access to your infrastructure.

Kubernetes
2025-03-20|8 min read

Kubernetes Service External IP Pending

Learn how to troubleshoot and resolve the issue of a Kubernetes service's external IP being stuck in the Pending state. Understand the causes and solutions for this common problem.

DevOps
2025-03-10|5 min read

Where Does the Convention of Using /healthz for Application Health Checks Come From?

Discover the origins of the /healthz endpoint convention for application health checks and why it has become a standard in modern software development.

Kubernetes
2025-03-01|8 min read

How Do I Get Logs from All Pods of a Kubernetes Replication Controller?

Learn how to retrieve logs from all Pods managed by a Kubernetes replication controller. Understand the commands and best practices for effective logging.

Terraform
2025-02-20|4 min read

Should I commit .tfstate files to Git?

Understand why committing .tfstate files to Git is not recommended and explore best practices for managing Terraform state.

Terraform
2025-02-15|5 min read

Specifying an API Gateway Endpoint with a Variable in Terraform

Learn how to dynamically specify an API Gateway endpoint with a variable in Terraform for flexible configurations.

Terraform
2025-02-05|5 min read

Conditional Attributes in Terraform

Learn how to use conditional expressions to dynamically set resource attributes in Terraform.

Terraform
2025-01-30|6 min read

Managing Different Environments in Terraform

Learn how to manage different environments in Terraform using workspaces, variable files, and directory structures.

Terraform
2025-01-23|6 min read

Should .terraform.lock.hcl Be in .gitignore? (The Answer Might Surprise You)

The .terraform.lock.hcl file causes confusion for many Terraform users. Learn why you should commit it to version control and how to handle it properly.

Terraform
2025-01-22|8 min read

Conditional Resource Creation in Terraform Based on .tfvars Variables

Learn how to conditionally create Terraform resources using variables from .tfvars files. Learn count, for_each, and dynamic blocks for flexible infrastructure.

Terraform
2025-01-20|5 min read

terraform.tfvars vs variables.tf: What is the Difference?

Understand the difference between terraform.tfvars and variables.tf in Terraform and how to use them effectively.

Terraform
2025-01-20|6 min read

Use Terraform to set up a Lambda function triggered by a scheduled event source

Learn how to use Terraform to create an AWS Lambda function triggered by a scheduled event source, such as a cron job.

Terraform
2025-01-13|7 min read

How to Fix "Error acquiring the state lock: ConditionalCheckFailedException"

Learn how to diagnose and fix Terraform state lock errors that prevent your infrastructure deployments from running.

Terraform
2025-01-10|5 min read

How to Load Input Data from a File in Terraform

Learn how to load input data from a file in Terraform using the `file` function and external data sources.

AWS
2025-01-02|5 min read

Correct way to attach AWS managed policies to a role?

Learn how to correctly attach AWS managed policies to an IAM role using the AWS Management Console, CLI, or Terraform.

Docker
2024-12-28|8 min read

How to Handle Persistent Storage for Databases in Docker

Learn how to properly manage database data in Docker containers using volumes, bind mounts, and best practices for data persistence across container restarts and deployments.

Kubernetes
2024-12-24|9 min read

Docker Compose vs Kubernetes: Understanding the Key Differences

Explore the fundamental differences between Docker Compose and Kubernetes, including use cases, complexity levels, and when to choose each container orchestration tool.

Kubernetes
2024-12-23|8 min read

Ingress vs Load Balancer in Kubernetes: When to Use Each

Learn the key differences between Kubernetes Ingress and LoadBalancer services, including use cases, cost implications, and implementation examples for optimal traffic routing.

Kubernetes
2024-12-22|8 min read

How to Use Local Docker Images with Minikube

Learn different methods to use locally built Docker images in Minikube, including docker-env, image loading, and registry configuration for efficient Kubernetes development.

Linux
2024-12-20|6 min read

How to Create Symbolic Links in Linux

Learn how to create and manage symbolic links (symlinks) in Linux to create shortcuts, organize files, and maintain flexible file system structures.

Kubernetes
2024-12-19|7 min read

How to Fix Pods Stuck in Terminating Status in Kubernetes

Learn how to diagnose and resolve Kubernetes pods that are stuck in Terminating status using kubectl commands, finalizers, and force deletion techniques.

Linux
2024-12-18|6 min read

How to Kill a Process Running on a Particular Port in Linux

Learn multiple methods to identify and terminate processes that are using specific ports on Linux systems using netstat, lsof, fuser, and ss commands.

Linux
2024-12-18|7 min read

How to Prompt for Yes/No/Cancel Input in Linux Shell Scripts

Learn how to create interactive shell scripts that prompt users for confirmation with Yes/No/Cancel options using various techniques and best practices.

Kubernetes
2024-12-16|9 min read

Difference Between ClusterIP, NodePort and LoadBalancer Service Types in Kubernetes

Understand the key differences between ClusterIP, NodePort, and LoadBalancer service types in Kubernetes, when to use each, and how they expose applications.

Linux
2024-12-15|5 min read

How to Check Which Process is Using a Specific Port from Command Line

Learn how to identify which processes are listening on specific ports using netstat, lsof, and ss commands across different operating systems.

Docker
2024-12-15|8 min read

Delete All Local Docker Images Safely

Learn how to reclaim disk space by removing Docker images, containers, and volumes without breaking your development workflow.

Docker
2024-12-15|6 min read

Docker Compose: Understanding Ports vs Expose

Learn the key differences between ports and expose in Docker Compose, when to use each one, and how they affect container networking and security in your applications.

Terraform
2024-12-15|6 min read

Terraform: Error Creating IAM Role. MalformedPolicyDocument: Has Prohibited Field Resource

Learn how to resolve the 'MalformedPolicyDocument: Has prohibited field Resource' error when creating an IAM role in Terraform.

Linux
2024-12-15|7 min read

How to Find Files Containing Specific Text on Linux

Need to locate files with specific content? Learn how to use grep, find, and other Linux tools to search through files and directories efficiently.

Git
2024-12-15|5 min read

How to Reset Local Git Branch to Match Remote Repository HEAD

Learn different methods to reset your local Git branch to exactly match the remote repository HEAD, including hard reset, fetch and reset, and when to use each approach safely.

Git
2024-12-14|5 min read

How to Reset or Revert a File to a Specific Revision in Git

Learn multiple ways to reset or revert a specific file to a previous version in Git, including using git checkout, git restore, and git show commands with practical examples.

Git
2024-12-13|5 min read

How to Push a New Local Branch to Remote Git Repository and Track It

Learn how to push a new local Git branch to a remote repository and set up tracking, including different methods for initial push, setting upstream branches, and managing branch relationships.

Kubernetes
2024-12-13|8 min read

kubectl apply vs kubectl create: Understanding the Key Differences

Learn the differences between kubectl apply and kubectl create commands, when to use each, and how they handle resource management in Kubernetes deployments.

Linux
2024-12-12|7 min read

How to Create a Copy of a Directory in Unix/Linux

Learn various methods to copy directories in Linux and Unix systems using cp, rsync, and tar commands with practical examples and best practices.

Git
2024-12-12|5 min read

How to Revert Git Repository to a Previous Commit Safely

Learn multiple safe methods to revert your Git repository to a previous commit, including using git revert, git reset, and git checkout with practical examples and safety considerations.

Linux
2024-12-12|7 min read

How to Loop Through File Content in Bash

Learn different methods to iterate through file content line by line in Bash scripts, including handling special characters and processing large files efficiently.

Linux
2024-12-10|6 min read

How to Change File and Folder Permissions Recursively in Linux

Learn how to use chmod command to change permissions for directories and all their subdirectories and files efficiently and safely.

Docker
2024-12-10|7 min read

How to Execute Multiple Commands in Docker Compose

Learn different techniques for running multiple commands in Docker Compose services, from simple command chaining to advanced multi-stage initialization scripts.

Git
2024-12-10|7 min read

How to Undo the Most Recent Local Commits in Git

Learn different ways to undo recent Git commits using reset, revert, and rebase commands. Understand when to use each method safely.

Terraform
2024-12-09|5 min read

How to Ignore Change of an Attribute in Terraform Blocks

Learn how to use the `lifecycle` block with the `ignore_changes` argument to ignore changes to specific attributes in Terraform.

Linux
2024-12-08|5 min read

How to Change Echo Text Colors in Linux Terminal

Learn how to colorize your terminal output using ANSI escape codes with the echo command to make scripts more readable and visually appealing.

Linux
2024-12-08|6 min read

How to Count Number of Lines in Files Using Linux Terminal

Learn different methods to count lines in text files like CSV, TXT, and other non-binary files using wc, awk, sed, and other Linux command-line tools.

Git
2024-12-08|6 min

How to Delete a Git Branch Locally and Remotely

Learn how to safely delete Git branches both on your local machine and remote repositories using different Git commands and safety checks.

Git
2024-12-07|5 min

How to Discard Unstaged Changes in Git

Learn different methods to discard unstaged changes in Git using checkout, restore, and clean commands. Learn selective and bulk change removal techniques.

Git
2024-12-06|6 min read

Move the Most Recent Commit(s) to a New Branch with Git

Learn how to move recent commits from your current branch to a new branch using git checkout, reset, and cherry-pick. Fix branch organization mistakes effectively.

Linux
2024-12-05|8 min read

How to Close Specific Ports on Linux Systems

Learn how to close and block specific ports on Linux using iptables, ufw, firewalld, and by stopping services. Secure your system by controlling port access.

Git
2024-12-05|8 min

What is the Difference Between Git Pull and Git Fetch?

Understand when to use git pull versus git fetch, how they affect your local repository, and which command is safer for different workflows.

Docker
2024-12-05|6 min read

How to Fix Docker "The input device is not a TTY" Error

Learn what causes the Docker TTY error and discover multiple solutions to fix it, from command-line flags to proper terminal configuration for interactive containers.

Linux
2024-12-05|5 min read

How to Use Grep to Show Only Filenames on Linux

Learn how to use grep options to display only the names of files containing matches, making it easier to identify relevant files in large searches.

Git
2024-12-05|5 min

How to Change the URI (URL) for a Remote Git Repository

Learn how to update remote repository URLs in Git when repositories are moved, renamed, or migrated. Learn remote management commands for seamless workflow continuation.

Git
2024-12-04|6 min read

How to Modify Existing, Unpushed Commit Messages

Learn how to change commit messages for unpushed commits using git commit --amend and interactive rebase. Learn message editing techniques for clean Git history.

Linux
2024-12-03|6 min read

How to Exclude Directories When Using Find in Linux

Learn how to exclude specific directories from find command searches to improve performance and focus on relevant results when searching through file systems.

Git
2024-12-03|8 min read

How to Resolve Git Merge Conflicts

Learn how to identify, understand, and resolve Git merge conflicts effectively. Learn conflict resolution strategies, tools, and prevention techniques for smooth collaboration.

Linux
2024-12-03|8 min read

How to Loop Through an Array of Strings in Bash

Learn various methods to iterate through string arrays in Bash, including indexed arrays, associative arrays, and advanced looping techniques with practical examples.

Git
2024-12-02|7 min

How to Cherry Pick Commits in Git

Learn how to selectively apply specific commits from one branch to another using git cherry-pick. Learn single and multiple commit cherry-picking with conflict resolution strategies.

Git
2024-12-02|5 min read

How to Rename a Local Git Branch

Learn how to rename Git branches locally using git branch -m, handle the current branch, and update remote tracking references safely.

Linux
2024-12-02|7 min read

How to Pipe to and from Clipboard in Bash Scripts

Learn how to integrate clipboard functionality into your Bash scripts using xclip, xsel, pbcopy, and pbpaste for seamless data transfer between terminal and GUI applications.

Kubernetes
2024-12-01|7 min read

What is the Difference Between a Pod and a Deployment?

Understanding the difference between Pods and Deployments in Kubernetes is crucial for managing containerized applications effectively. Learn how they work and when to use each.

Git
2024-12-01|7 min read

How to Reset Git to a Previous Commit

Learn different ways to reset your Git repository to a previous commit state. Understand the differences between soft, mixed, and hard resets and when to use each approach.

Terraform
2024-12-01|7 min read

How to Split a Terraform File (main.tf) into Several Files (No Modules)

Organizing Terraform configurations by splitting a single main.tf file into multiple files can improve readability and maintainability. Learn how to do this without using modules.

Git
2024-11-30|6 min read

How to Stash Changes in Git

Learn how to temporarily save your work in progress using Git stash. Learn stashing, applying, and managing multiple stashes to handle interruptions in your development workflow.

Linux
2024-11-30|6 min read

How to Recursively Grep All Directories and Subdirectories

Learn how to use grep with recursive options to search through entire directory trees efficiently, including advanced filtering and performance optimization techniques.

Git
2024-11-29|6 min read

How to View Git Commit History

Learn various ways to explore and analyze your Git commit history. Learn git log options, filtering techniques, and formatting to understand your project evolution and track changes effectively.

Linux
2024-11-28|8 min read

Defining Variables with and without Export in Linux Shell

Understand the difference between regular shell variables and exported environment variables, when to use export, and how variable scope affects scripts and processes.

Linux
2024-11-28|6 min read

How to Find Files Using Wildcards in Linux

Learn how to use wildcard patterns with find command to recursively search for files in directories and subdirectories based on name patterns.

Git
2024-11-28|6 min read

How to Undo Git Add Before Commit

Learn how to unstage files that you've added to Git's staging area using git reset, git restore, and other methods before committing.

Git
2024-11-25|7 min

How to Force Git Pull to Overwrite Local Files

Learn how to use git reset, git clean, and git checkout to force git pull to overwrite local changes when you need to match the remote repository exactly.

Linux
2024-11-25|8 min read

How to Profile C++ Code Performance on Linux

Learn how to use profiling tools like gprof, Valgrind, and perf to analyze C++ application performance and identify bottlenecks on Linux systems.

Linux
2024-11-22|5 min read

How to Delete Exported Environment Variables in Linux

Learn different methods to remove environment variables from your current shell session and prevent them from persisting in future sessions.

Git
2024-11-22|6 min

How to Check Out a Remote Git Branch

Learn different methods to check out remote Git branches locally using git checkout, git switch, and git fetch commands with practical examples.

Cloud
2024-11-20|10 min read

How We Reduced Our AWS Bill by 73% While Actually Improving Performance

The counterintuitive strategies we used to slash cloud costs while actually improving application performance.

Docker
2024-11-20|7 min read

Where Docker Images Are Stored on Your Host Machine

Discover where Docker stores images, containers, and volumes on different operating systems, and learn how to manage Docker's storage footprint effectively.

Terraform
2024-11-20|5 min read

How to Execute Terraform Actions Without the Interactive Prompt

Learn how to automate Terraform workflows by bypassing the interactive prompt for commands like apply and destroy.

Git
2024-11-19|6 min read

How to Make Git Forget About a File That Was Tracked But Is Now in .gitignore

Learn how to remove files from Git tracking while keeping them locally when you add them to .gitignore after they were already committed.

CI/CD
2024-11-18|7 min read

The GitHub Actions Workflow That Eliminated Our DevOps Bottleneck

How we reduced deployment time from 2 hours to 8 minutes using smart GitHub Actions patterns and parallel execution strategies.

Git
2024-11-16|6 min read

How to Remove Local Untracked Files from Git Working Tree

Learn how to use git clean to remove untracked files and directories from your Git working tree safely with different options and safety checks.

Bash
2024-11-15|8 min read

How to Check if a Variable is Set in Bash

Learn multiple methods to check if variables are set, unset, empty, or have specific values in Bash scripts with practical examples and best practices.

Docker
2024-11-15|6 min read

How to Fix Docker: Permission Denied

Getting a 'permission denied' error when using Docker can be frustrating. Here's how to fix it depending on the OS, Docker command, and user setup.

Terraform
2024-11-15|4 min read

How do you do simple string concatenation in Terraform?

Learn how to perform string concatenation in Terraform using interpolation and the join function.

Terraform
2024-11-15|6 min read

How to for_each through a list(objects) in Terraform

Learn how to use the for_each construct in Terraform to iterate through lists of objects and dynamically create resources.

Kubernetes
2024-11-15|8 min read

Why Running Postgres on Kubernetes Is Still a Bad Idea (And What to Do Instead)

Everyone wants to run databases on Kubernetes, but should you? We explore the real challenges of stateful workloads and better alternatives.

AWS
2024-11-10|6 min read

AWS ASG Launch Templates vs Launch Configurations

Understand the key differences between AWS Auto Scaling Group Launch Templates and Launch Configurations to make informed decisions for your infrastructure.

Kubernetes
2024-11-10|5 min read

How to List All Pods and Their Nodes in Kubernetes

Learn how to list all pods in your Kubernetes cluster along with the nodes they're running on, using kubectl and command-line tools for clear, actionable output.

Docker
2024-11-08|6 min read

How to Remove Old Docker Containers

Over time, stopped Docker containers pile up and take up space. Learn how to list, filter, and clean up unused containers safely and efficiently.

Terraform
2024-11-05|6 min read

How to Attach Multiple IAM Policies to IAM Roles Using Terraform

Learn how to attach multiple IAM policies to a single IAM role in Terraform to manage permissions effectively.

Bash
2024-11-05|8 min read

How to Check if a String Contains a Substring in Bash

Learn multiple methods to check for substring presence in Bash, including pattern matching, case-insensitive searches, and practical examples for string validation.

Terraform
2024-11-02|5 min read

Fixing the "Invalid Legacy Provider Address" Error in Terraform

Learn how to resolve the 'Invalid legacy provider address' error in Terraform by upgrading your provider configurations.

Docker
2024-11-01|5 min read

How Do I Pass Environment Variables to Docker Containers?

Environment variables are a clean way to configure your Docker containers without hardcoding values. This guide shows different methods and when to use each.

Terraform
2024-11-01|5 min read

Variables Within Variables in Terraform

Learn how to use variables within variables in Terraform to create dynamic and reusable configurations.

AWS
2024-10-30|7 min read

How to Nuke All AWS Resources in an AWS Account

Learn how to safely and efficiently delete all resources in an AWS account using tools like AWS CLI and Terraform.

Terraform
2024-10-29|5 min read

How to Display Sensitive Data Output Variables in Terraform

Learn how to handle and display sensitive data output variables in Terraform safely and effectively.

Docker
2024-10-25|4 min read

How to Force Docker for a Clean Build of an Image

Docker caches layers to speed up builds, but sometimes you want a completely fresh image build. Here's how to force Docker to skip the cache and build from scratch.

Terraform
2024-10-23|7 min read

Determining Minimum AWS Permissions for Terraform Configurations

Learn how to identify the minimum AWS permissions required for your Terraform configurations to enhance security and compliance.

Bash
2024-10-22|7 min read

How to Concatenate String Variables in Bash

Learn multiple ways to combine string variables in Bash scripts, from simple concatenation to complex string operations with practical examples.

Docker
2024-10-22|7 min read

Docker Image vs Container: Key Differences

Learn the fundamental difference between Docker images and containers through practical examples and real-world scenarios.

Terraform
2024-10-20|6 min read

Terraform + DynamoDB: All Attributes Must Be Indexed

Learn how to handle the 'all attributes must be indexed' requirement in DynamoDB when using Terraform.

DevOps
2024-10-18|7 min read

Should I Use Vagrant or Docker for Creating an Isolated Environment?

Choosing between Vagrant and Docker depends on your workflow and what kind of isolation you need. This guide walks through real-world use cases to help you decide.

Kubernetes
2024-10-12|6 min read

How to Update a Kubernetes Secret Generated from a File

Learn how to update an existing Kubernetes secret when its data comes from a file, with practical kubectl commands and tips for safe secret management.

Networking
2024-10-12|4 min read

Who is Listening on a Given TCP Port on Mac OS X?

Need to find out which process is using a specific port on your Mac? Here's how to check which application is listening on a TCP port using built-in macOS tools.

Docker
2024-10-11|5 min read

How to Get a Docker Container's IP Address from the Host

Learn how to find a Docker container's internal IP address from your host machine using simple Docker commands. This is useful for debugging, testing services, or container communication.

Bash
2024-10-01|7 min read

How to Set a Variable to the Output of a Command in Bash

Learn multiple methods to capture command output in Bash variables using command substitution, including best practices and error handling techniques.

Kubernetes
2024-09-28|6 min read

How to Clean Up ReplicaSets When Updating Kubernetes Deployments

Learn how and when to clean up old ReplicaSets after updating Kubernetes Deployments, why they accumulate, and how to manage rollout history for a tidy cluster.

Docker
2024-09-18|12 min read

Docker Security Best Practices

Secure your Docker environment from development to production with practical techniques for image hardening, runtime protection, and vulnerability management.

Python
2024-09-15|6 min read

Finding Local IP Addresses Using Python's stdlib

Learn how to find the local IP address of your machine using only Python's standard library. No third-party packages required.

Linux
2024-09-12|7 min read

How to Fix Echo Newline in Bash When It Prints Literal \n

Learn why echo sometimes prints literal \n instead of newlines and discover multiple solutions to properly output newline characters in Bash scripts.

Linux
2024-09-05|9 min read

How to Parse Command Line Arguments in Bash

Learn various methods to parse command line arguments in Bash scripts, including positional parameters, getopts, and advanced argument handling techniques.

Networking
2024-09-01|7 min read

How to Get Your Local IP Address

Learn multiple methods to find your local IP address using command line tools, programming languages, and system utilities across different operating systems.

Kubernetes
2024-09-01|5 min read

kubectl logs - Continuously

Learn how to use kubectl to stream logs continuously from Kubernetes Pods for real-time monitoring.

Docker
2024-08-25|10 min read

Exploring a Docker Container's File System

Debug application issues by navigating container file systems, examining logs, and understanding how Docker layers affect your running containers.

FinOps
2024-08-22|12 min read

What Is FinOps? A Beginner's Guide to Cloud Cost Management

Discover how FinOps transforms chaotic cloud spending into strategic financial operations, bringing teams together to optimize costs while maintaining innovation speed.

Kubernetes
2024-08-20|5 min read

Kubernetes: How to Make Deployment to Update Image

Learn how to update the container image in a Kubernetes Deployment using kubectl commands.

Terraform
2024-08-15|5 min read

Fixing "A Reference to Resource Type Must Be Followed by At Least One Attribute Access" in Terraform

Learn how to resolve the error 'A reference to resource type must be followed by at least one attribute access' in Terraform.

Linux
2024-08-14|8 min read

How to Change the Output Color of Echo in Linux

Learn how to add colors to your echo output in Linux and Bash scripts using ANSI escape codes, tput commands, and color variables for better terminal display.

Kubernetes
2024-08-13|6 min read

How to Sign In to the Kubernetes Dashboard

Learn how to securely access and sign in to the Kubernetes Dashboard, including token generation, best practices, and troubleshooting common login issues.

Networking
2024-08-12|5 min read

How to Find Which Process Is Listening on a Port in Windows

Need to know which application is using a specific TCP or UDP port on Windows? Here's how to check using netstat, tasklist, PowerShell, and Resource Monitor.

Python
2024-08-11|6 min read

What Is the Quickest Way to HTTP GET in Python?

Need to make a quick HTTP GET request in Python? Here's how to do it with standard libraries and third-party tools, including pros and tradeoffs.

Kubernetes
2024-08-10|6 min read

Service Located in Another Namespace

Learn how to access and interact with Kubernetes Services located in different namespaces.

Kubernetes
2024-08-01|5 min read

How to Cleanly List All Containers in a Kubernetes Pod

Learn several ways to list all containers in a Kubernetes pod using kubectl and JSONPath, with practical examples for real-world troubleshooting and automation.

Kubernetes
2024-08-01|6 min read

Listing All Resources in a Namespace

Learn how to list all resources in a Kubernetes namespace using kubectl commands.

Networking
2024-07-30|8 min read

How to Artificially Create a Connection Timeout Error

Learn practical methods to simulate connection timeouts for testing error handling, resilience patterns, and timeout configurations in your applications.

Docker
2024-07-30|9 min read

How to Remove Old and Unused Docker Images

Reclaim disk space efficiently by identifying and removing outdated Docker images while preserving the ones you need for active development and production.

Linux
2024-07-29|6 min

Redirecting Output to Both a File and stdout in Bash

Learn how to capture command output in a file while still seeing it live in your terminal

Terraform
2024-07-26|5 min read

Using a Git Branch as a Source for Terraform Modules

Learn how to use a specific Git branch as the source for Terraform modules to manage versioning and development workflows.

Terraform
2024-07-24|5 min read

Getting an Environment Variable in Terraform Configuration

Learn how to retrieve and use environment variables in Terraform configurations using the `env` function and input variables.

Kubernetes
2024-07-15|6 min read

How to Switch kubectl Clusters Between gcloud and minikube

Learn how to seamlessly switch between gcloud and minikube clusters using kubectl commands.

AWS
2024-07-15|5 min read

The provided execution role does not have permissions to call DescribeNetworkInterfaces on EC2

Learn how to resolve the 'execution role does not have permissions to call DescribeNetworkInterfaces' error in AWS EC2.

Kubernetes
2024-07-10|7 min read

Checking Kubernetes Pod CPU and Memory Utilization

Learn how to monitor CPU and memory usage of Kubernetes Pods using kubectl and metrics-server.

Kubernetes
2024-07-10|6 min read

How Can I Keep a Container Running on Kubernetes?

Learn how to ensure your container stays running on Kubernetes by using proper configurations and best practices.

Bash
2024-07-08|6 min read

How to Check if a File Does Not Exist in Bash

Learn various methods to test for file non-existence in Bash scripts, including proper error handling, permission checks, and practical automation examples.

Bash
2024-07-08|7 min read

How to Extract Filename and Extension in Bash

Learn multiple methods to extract filenames, extensions, and directory paths from file paths in Bash using parameter expansion and basename commands.

Kubernetes
2024-07-01|6 min read

At Least One Invalid Signature Was Encountered

Understand the causes of invalid signatures in Kubernetes and learn how to troubleshoot and resolve them.

Kubernetes
2024-07-01|7 min read

How to Delete All Resources from Kubernetes at One Time

Learn how to delete all resources in a Kubernetes namespace or cluster using kubectl commands.

Terraform
2024-06-21|5 min read

Is there an AND/OR Conditional Operator in Terraform?

Learn how to use AND/OR conditional operators in Terraform to create dynamic configurations.

Kubernetes
2024-06-20|6 min read

Why Does a Kubernetes Pod Get Recreated When Deleted?

Learn why Kubernetes automatically recreates Pods when they are deleted, and understand the mechanisms behind this behavior.

Terraform
2024-06-19|5 min read

Refactoring modules: Error: Provider configuration not present

Learn how to resolve the 'Provider configuration not present' error when refactoring Terraform modules.

Terraform
2024-06-17|4 min read

How can I remove a resource from Terraform state?

Learn how to safely remove a resource from Terraform state without affecting the actual infrastructure.

Terraform
2024-06-16|5 min read

How are data sources used in Terraform?

Understand how to use data sources in Terraform to fetch information about existing resources.

Kubernetes
2024-06-15|7 min read

How Does kubectl port-forward Create a Connection?

Understand how kubectl port-forward works to create connections between your local machine and Kubernetes Pods.

Kubernetes
2024-06-15|6 min read

Kubernetes API - Get Pods on Specific Nodes

Learn how to use the Kubernetes API to retrieve Pods running on specific nodes in your cluster.

Terraform
2024-06-15|5 min read

Upgrade Terraform to Specific Version

Learn how to upgrade Terraform to a specific version on your system, ensuring compatibility with your infrastructure.

Bash
2024-06-12|8 min read

How to Split a String on a Delimiter in Bash

Learn multiple methods to split strings using delimiters in Bash, including IFS, parameter expansion, and array techniques with practical examples.

Terraform
2024-06-11|5 min read

Initial setup of Terraform backend using Terraform

Learn how to configure a Terraform backend for secure and efficient state management.

Kubernetes
2024-06-10|7 min read

Real-World Kubernetes Deployments

Lessons learned from deploying Kubernetes in production environments.

Terraform
2024-06-08|6 min read

Terraform Infrastructure as Code Best Practices

How to write scalable and maintainable Terraform code for your cloud infrastructure.

Kubernetes
2024-06-01|5 min read

Get YAML for Deployed Kubernetes Services

Learn how to retrieve the YAML configuration for deployed Kubernetes Services using kubectl commands.

Networking
2024-05-21|5 min read

What Is the Difference Between a Port and a Socket?

Ports and sockets are often mentioned together in networking, but they serve different roles. This guide breaks down what they are and how they work together.

Linux
2024-05-20|6 min read

How to Check if a Directory Exists in Bash Shell Scripts

Learn multiple methods to check directory existence in Bash scripts, including proper error handling, permission checks, and practical use cases for reliable automation.

Kubernetes
2024-05-20|7 min read

How Can I Debug "ImagePullBackOff"?

Learn how to troubleshoot and resolve the ImagePullBackOff error in Kubernetes Pods.

Kubernetes
2024-05-20|5 min read

How to Copy Files from Kubernetes Pods to Local System

Learn how to use kubectl commands to copy files from Kubernetes Pods to your local system.

Terraform
2024-05-15|5 min read

I would like to run Terraform only for a specific resource

Learn how to target specific resources in Terraform to save time and avoid unnecessary changes.

Kubernetes
2024-05-10|6 min read

Restart Pods When ConfigMap Updates in Kubernetes

Learn how to restart Kubernetes Pods automatically when a ConfigMap is updated.

Terraform
2024-05-05|6 min read

How to Migrate Terraform State Between Projects

Learn how to safely migrate Terraform state between projects using the `terraform state` command.

Bash
2024-05-03|6 min read

How to Redirect and Append Both stdout and stderr to a File in Bash

Learn different methods to capture both standard output and error streams in Bash, including appending to files and separating streams for better logging.

Bash
2024-05-03|7 min read

How to Check if a Program Exists from a Bash Script

Learn multiple reliable methods to check if a command or program is available on your system from within Bash scripts, including using which, command, and type.

Kubernetes
2024-04-25|7 min read

Difference Between targetPort and port in Kubernetes Service Definition

Understand the distinction between targetPort and port in Kubernetes Service definitions, and learn how they impact your application's networking.

Terraform
2024-04-22|6 min read

Terraform - Delete All Resources Except One

Learn how to delete all resources managed by Terraform except for a specific resource by using targeted commands and state manipulation.

Terraform
2024-04-21|6 min read

How to Write an if, else, elsif Conditional Statement in Terraform

Learn how to use if, else, and elsif conditional statements in Terraform to create dynamic configurations.

Bash
2024-04-18|8 min read

What Does "2>&1" Mean in Linux and Bash?

Learn what the 2>&1 redirection operator means in Linux commands, how it works with standard output and error streams, and when to use it effectively.

Bash
2024-04-12|7 min read

How to Count Lines of Code in a Directory Recursively

Discover multiple methods to count source code lines across entire directory trees, including filtering by file types and excluding specific directories.

Terraform
2024-03-29|7 min read

Terraform Failing with Invalid for_each Argument / The Given "for_each" Argument Value is Unsuitable

Learn how to troubleshoot and fix the "Invalid for_each argument" error in Terraform.

Terraform
2024-03-21|6 min read

Can Terraform Be Used to Provision On-Premises Servers?

Learn how Terraform can be used to provision on-premises servers by integrating with tools like VMware vSphere, Ansible, and bare-metal providers.

Bash
2024-03-15|7 min read

How to Get the Directory Where a Bash Script is Located

Learn multiple reliable methods to determine the directory path of your Bash script from within the script itself, including handling symbolic links and edge cases.

Kubernetes
2024-03-15|5 min read

How to Get Events Only for a Pod with kubectl

Learn how to filter and view Kubernetes events for a specific pod using kubectl, with practical examples for troubleshooting and automation.

Kubernetes
2024-03-12|7 min read

How to Set Multiple Commands in One YAML File with Kubernetes

Learn how to define and run multiple commands in a Kubernetes Pod using a single YAML manifest. This guide covers best practices and real-world examples for multi-step container initialization.

Bash
2024-03-08|5 min read

How to Iterate Over a Range of Numbers in Bash Using Variables

Learn different methods to loop through number ranges defined by variables in Bash, from simple for loops to advanced sequence generation techniques.

Terraform
2024-02-21|4 min read

Concatenate a String with a Variable in Terraform

Learn how to concatenate strings with variables in Terraform to create dynamic configurations.

Kubernetes
2024-02-18|5 min read

How to Decode a Kubernetes Secret

Kubernetes secrets store sensitive data in base64-encoded form. Learn how to safely decode and inspect these secrets using kubectl and command-line tools.

Terraform
2024-02-18|6 min read

Modules + Output from for_each

Learn how to use for_each with modules in Terraform to dynamically create resources and manage outputs.

Bash
2024-02-15|4 min read

How to Reload .bashrc Settings Without Logging Out

Need to apply changes to your .bashrc file immediately? Learn multiple methods to reload your Bash configuration without restarting your terminal session.

Terraform
2024-01-23|5 min read

Terraform Statefile is Locked: How to Unlock It

Learn how to unlock a locked Terraform statefile using the `force-unlock` command and best practices to avoid future locks.

Bash
2024-01-22|6 min read

Looping Through File Content Line by Line in Bash

Learn multiple techniques to read and process file content line by line in Bash scripts, including handling special characters and preserving whitespace.

Kubernetes
2024-01-22|8 min read

How to Manage Multiple Environments in Kubernetes (Staging, QA, Production)

Learn practical strategies for managing multiple Kubernetes environments like staging, QA, and production. This guide covers namespace organization, configuration management, and deployment workflows.

Kubernetes
2024-01-10|6 min read

How to Restart a Container Within a Kubernetes Pod

Learn practical ways to restart a container inside a Kubernetes pod, including when and why you might need to do this, and the best approaches for different scenarios.

Kubernetes
2024-01-05|8 min read

Kubernetes Pods Keep Crashing with CrashLoopBackOff but No Logs Found

Troubleshoot Kubernetes pods stuck in CrashLoopBackOff with no logs. Learn why this happens and how to diagnose and resolve the issue.

Kubernetes
2024-01-02|7 min read

Kubernetes Deployments vs StatefulSets

Understand the differences between Kubernetes Deployments and StatefulSets, when to use each, and how they impact your application's behavior and scaling.