Which command runs a container with environment variables GREET and NAME and prints them using printenv?

Which command runs a container with environment variables GREET and NAME and prints them using printenv?

• A. sudo podman run -e GREET=Hello -e NAME=RedHat rhel7:7.5 printenv GREET NAME
• B. sudo podman run -e GREET=Hello -e NAME=RedHat:7.5 printenv GREET NAME
• C. sudo podman run -e GREET=Hello -e NAME=RedHat rhel7:7.5 printenv GREET
• D. sudo podman run -e GREET=Hello -e NAME=RedHat rhel7:7.5 printenv GREET NAME

Answer: (A)

The command demonstrates how to pass environment variables into a container and then run a command inside the container to show them. Podman run uses -e to set environment variables for the container. The command after the image name is executed inside the container, so printenv GREET NAME asks the container to print the values of both GREET and NAME. In the best option, both GREET and NAME are defined (GREET=Hello and NAME=RedHat), the image rhel7:7.5 is specified, and the internal command printenv GREET NAME prints both variables, yielding both values inside the container. The other choices fail by either not providing both environment variables, printing only one variable, or misplacing the image/command syntax so the container can’t run as intended.

The command demonstrates how to pass environment variables into a container and then run a command inside the container to show them. Podman run uses -e to set environment variables for the container. The command after the image name is executed inside the container, so printenv GREET NAME asks the container to print the values of both GREET and NAME.

In the best option, both GREET and NAME are defined (GREET=Hello and NAME=RedHat), the image rhel7:7.5 is specified, and the internal command printenv GREET NAME prints both variables, yielding both values inside the container. The other choices fail by either not providing both environment variables, printing only one variable, or misplacing the image/command syntax so the container can’t run as intended.