Docker ENTRYPOINT and CMD seen as verb and parameter


Example

Suppose you have a Dockerfile ending with

ENTRYPOINT [ "nethogs"] CMD ["wlan0"]

if you build this image with a

docker built -t inspector .

launch the image built with such a Dockerfile with a command such as

docker run -it --net=host --rm inspector

,nethogs will monitor the interface named wlan0

Now if you want to monitor the interface eth0 (or wlan1, or ra1...), you will do something like

docker run -it --net=host --rm inspector eth0

or

docker run -it --net=host --rm inspector wlan1