6. Inspect an Image

• -format (Format Output)

• Meaning: Formats the output of the inspect command. Usage: Allows specifying a custom format for the output. Example: docker inspect --format '{{.Config.Env}}' my-image displays environment variables of my-image.

  docker inspect --format '{{json .}}' <image_id>
  
  

7. Prune Unused Images

• -all (All Unused)

  docker image prune --all
  
  

  Meaning: Removes all unused images, not just dangling ones. Usage: Cleans up all images that are not currently used by any containers. Example: docker image prune --all removes all unused images.

• -filter (Filter)

  docker image prune --filter "label=<key>=<value>"
  
  

  Meaning: Filters images to prune based on specified criteria. Usage: Allows selective pruning based on labels or other criteria. Example: docker image prune --filter "until=24h" removes images not used in the last 24 hours.

8. Save an Image

• o (Output File)Meaning: Saves an image to a tar archive file. Usage: Useful for backing up or transferring images. Example: docker save -o my-image.tar my-image saves my-image to my-image.tar.

  docker save -o <output_file> <image>
  
  

9. Load an Image

• i (Input File)Meaning: Loads an image from a tar archive file. Usage: Imports images from tar files. Example: docker load -i my-image.tar loads the image from my-image.tar.

  docker load -i <input_file>