entry point Dockerfile code example

Example 1: dockerfile entrypoint python3

Dockerfile    Command
ENTRYPOINT /bin/ping -c 3
CMD localhost    /bin/sh -c '/bin/ping -c 3' /bin/sh -c localhost
ENTRYPOINT ["/bin/ping","-c","3"]
CMD localhost    /bin/ping -c 3 /bin/sh -c localhost
ENTRYPOINT /bin/ping -c 3
CMD ["localhost"]"    /bin/sh -c '/bin/ping -c 3' localhost
ENTRYPOINT ["/bin/ping","-c","3"]
CMD ["localhost"]    /bin/ping -c 3 localhost

Example 2: dockerfile run app cmd

RUN apt-get install python3
CMD echo "Hello world"
ENTRYPOINT echo "Hello world"