Docker Remove Images

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In this quick guide, we’ll discuss the Docker command to remove one or more images and we will also demonstrate its use with a practical Spring Boot application example.

Check out all Docker tutorials and guides: Docker Tutorials and Guides

Basic Syntax

To remove Docker images, the primary command you'll be using is docker rmi. 

Syntax:

docker rmi [OPTIONS] IMAGE [IMAGE...]

Where IMAGE can be either the image ID or the image name.

Practical Examples

Pulling a Spring Boot Image:

Let's begin by pulling a sample Spring Boot application image from Docker Hub:

docker pull springio/gs-spring-boot-docker

Listing Images: 

To see the list of images:

docker images

From this list, identify the IMAGE ID or name of the image you intend to remove.

Removing a Single Image by ID:

Once you have the IMAGE ID, use the docker rmi command:

docker rmi <IMAGE_ID>

For instance, if your IMAGE ID is abcdef1234, you would run:

docker rmi abcdef1234

Removing a Single Image by Name:

 Alternatively, you can also remove an image by its name:

docker rmi springio/gs-spring-boot-docker

Removing Multiple Images: 

To delete multiple images at once, list their IMAGE IDs or names separated by spaces:

docker rmi <IMAGE_ID1> <IMAGE_ID2> <IMAGE_NAME1>

Force Removing an Image: 

Sometimes, an image might be in use by a stopped container. If you're sure about removing the image, you can force its removal:

docker rmi -f <IMAGE_ID_or_NAME>

Automated Cleanup: 

If you're looking to clean up multiple unused images, you might want to consider:

docker image prune

This command will remove all dangling images (images without a tag). If you wish to remove all unused images (not just the dangling ones), you can use:

docker image prune -a

Conclusion

Regularly cleaning up unused Docker images helps in maintaining a clean disk space and ensures smoother operations. Remember always to be cautious and double-check the images you're about to delete, especially in production environments. With docker rmi in your toolbox, you're now equipped to manage your Docker images effectively. Safe cleaning!

Related Docker Image Management Guides

• Docker Create Image From Dockerfile
• Docker List Images
• Docker Remove Images
• Docker Pull Image From Registry (Docker Hub)
• Docker Push an Image to Registry (Docker Hub)
• Docker Save Image as TAR
• Docker Remove Unused Images
• Docker Rename image

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