Create a docker image from a running container

Question

I want to create a docker image with a few customizations. I have an existing image of 16GB and I have launched it as a container. Now I have deleted all the unnecessary files from the container and committed it as a new image. But the new image is still showing 16GB. Actually the new image should have only ~1GB in size.

How can I create a new small size image from a running container? Steps followed:

1) launched a container from the 16GB image
2) deleted unwanted files from the container
3) committed new image from the container 

Thanks sarath

Answer 1

If you just need to reduce the size of the existing image, export it using docker export and then import it using docker import.

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