To run a Dockerfile with a random user instead of 'wildfly', which sequence of changes should be applied?

To run a Dockerfile with a random user instead of 'wildfly', which sequence of changes should be applied?

• A. 4, 3, 2, 1
• B. 2, 4, 1, 3
• C. 1, 3, 2, 4
• D. 1, 2, 3, 4 in that order

Answer: (D)

To run a Dockerfile with a random user (non-root) instead of wildfly, you need a non-root user defined, proper file ownership set for that user, and you run the image with that user. The best sequence is to first create the non-root user, then adjust file ownership and permissions so the new user can access what it needs, then switch the effective user to that non-root user, and finally ensure the container’s entrypoint runs under that user. This order works because you must have a user in place before you can switch to it, and you must own the application files as that user before you drop privileges. If you tried to change file ownership after already dropping to the new user, you’d lack the necessary privileges; if you tried to run as a non-root user before creating it, there’d be nothing to switch to.

To run a Dockerfile with a random user (non-root) instead of wildfly, you need a non-root user defined, proper file ownership set for that user, and you run the image with that user. The best sequence is to first create the non-root user, then adjust file ownership and permissions so the new user can access what it needs, then switch the effective user to that non-root user, and finally ensure the container’s entrypoint runs under that user. This order works because you must have a user in place before you can switch to it, and you must own the application files as that user before you drop privileges. If you tried to change file ownership after already dropping to the new user, you’d lack the necessary privileges; if you tried to run as a non-root user before creating it, there’d be nothing to switch to.