Use of Dockerfile cmd

three forms of cmd: cmd ["Executable", "param1", "param2"] (exec form, preferred format) cmd ["param1", "param2"] (as the default parameter of entrypoint) cmd command param1 par AM2 (shell form) Note: the above exec form will be parsed into a JSON array, which means you must use double quotes instead of single quotes. The exec form does not invoke the command shell.
For example, cmd ["echo", "home"] is not in the H O M E "] is not in the home"] does not replace the home variable. If the shell is used, it should be: cmd ["sh", "-C", "Echo $HOME"] A dockfile should have only one CMD, if there are more than one, will only perform the last format used example:

CMD ["Sh", "run.sh"]
Or
CMD SH run.sh