How to remove unnecessary images in docker?

To remove unnecessary Docker images, you can follow these steps:

Open the terminal or command prompt to access the command line interface of your operating system.

Run the following command to list all Docker images:

   docker images

Identify which images are unnecessary based on your needs. Typically, only images labeled “” are considered unnecessary, as they are either a result of build failures or incorrect naming.

4. Use the following command to delete unnecessary images (replace `` with the actual ID of the image to be deleted):

   docker rmi <IMAGE_ID>

If you want to delete multiple unused images, you can specify multiple image IDs in the command, separated by spaces, for example:

   docker rmi <IMAGE_ID_1> <IMAGE_ID_2> <IMAGE_ID_3>

You can use the following command to remove all unnecessary images.

   docker rmi $(docker images -f "dangling=true" -q)

This command will use the filtering options of the `docker images` command to search for all unused images and delete them one by one.

Please note that deleting an image is an irreversible action, so make sure you truly want to delete these images. Additionally, you need to run the above command with administrator privileges or add `sudo` before the command (for example: `sudo docker rmi `) if you are using a Linux system.