Mastering Docker: Essential Docker Commands Every Developer Should Know

Introduction

Docker has transformed the way developers create, ship, and run applications. Docker, as a cornerstone of containerization, enables teams to create lightweight, portable, and consistent environments. To fully utilize Docker’s capabilities, developers must be familiar with its command-line interface. In this post, we will look at essential Docker commands that will help you improve your containerization game.

 

1. Pulling Docker Images:

Before diving into the world of Docker containers, you will frequently need to download pre-built images from Docker Hub. Enter the following command:

Replace <image_name> with the desired image name and <tag> with the specific version or ‘latest.’ 

 

2. Running Docker Containers:

Starting containers is an essential Docker ability. Using a pulled image as a basis, the subsequent command launches a container:

Replace <container_name> with a name for your container.

 

3. Viewing Running Containers:

Keep tabs on your running containers using:

For a comprehensive list, including stopped containers, add the -a flag:

 

4. Stopping and Removing Containers:

When you’re done with a container, gracefully stop it with:

To remove a stopped container, use:

 

5. Viewing Container Logs:

Troubleshooting? View container logs with:

 

6. Executing Commands Inside a Container:

Interact with a running container’s shell:

Replace sh with your preferred shell.

 

7. Building Docker Images:

Craft your Docker image using a Dockerfile. Navigate to the directory containing the Dockerfile and run:

 

8. Pushing Images to Docker Hub:

Share your custom images by pushing them to Docker Hub:

 

9. Cleaning Up Docker Artifacts:

Reclaim disk space by removing dangling images, stopped containers, and more:

Use the -a flag to include unused images.

 

These Docker commands are the foundation of effective containerization workflows. Whether you are a seasoned Docker user or just getting started, knowing these commands will help you speed up your development and deployment processes.

Accept Docker’s power, and stay tuned for more useful tips and tutorials. Good luck with your containerizing!

Author : Vishal Vyas

Tags: Docker, Containerization, DevOps, Docker Commands, Docker Hub

Feel free to add your own experiences or specific use cases involving Docker commands to this article.