Computer scienceSystem administration and DevOpsDockerBuilding images with Dockerfile

Dockerfile (COPY, ADD, ENV, ARG)

Correct ARG usage format

Report a typo

You are working with the Dockerfile shown below.

ARG VERSION
FROM ubuntu:$VERSION
 
LABEL author=HyperUser 

ENV HOST_FILE='demo.txt'
ENV IMAGE_DESTINATION="/tmp"
COPY $HOST_FILE $IMAGE_DESTINATION

ENTRYPOINT ["ls", "/tmp"]

What will happen if you build the image with the following command?

$ docker build --build-arg $VERSION=22.04 -t ubuntu:v2 .

Select one option from the list

Build will fail because of incorrect ARG variable format passed when building the image.

Docker will build the image with the 22.04 Ubuntu image.

Build will fail due to incorrect ENV variable format inside the Dockerfile.

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