dockerfile CMD command
FROM ubuntu
CMD ["/usr/bin/wc","--help"]dockerfile CMD command
FROM ubuntu
CMD ["/usr/bin/wc","--help"]docker file
# getting base image from ubuntu
FROM ubuntu:18.04
RUN apt-get update
CMD ["echo", "HEY from docker image"]dockerfile run app cmd
RUN apt-get install python3
CMD echo "Hello world"
ENTRYPOINT echo "Hello world"Copyright © 2021 Codeinu
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