RHCE Containers and Podman

Question 1

What is the primary container tool used in RHEL 8+ instead of Docker?

Accepted Answer

Podman

Answer

Red Hat replaced Docker with Podman in RHEL 8, offering a daemonless, rootless container experience compatible with Docker CLI syntax.

Question 2

Which command runs a container from the `ubi8` image interactively with a bash shell?

Accepted Answer

podman run -it ubi8 bash

Answer

`podman run -it` creates and starts a container interactively (`-i`) with a pseudo-terminal (`-t`) and runs bash.

Question 3

What is a key advantage of Podman over Docker in RHEL?

Accepted Answer

Supports rootless containers without a background daemon

Answer

Podman is daemonless and supports rootless containers, improving security by not requiring a privileged background service.

Question 4

Which command lists all running containers in Podman?

Accepted Answer

podman ps

Answer

`podman ps` lists all currently running containers, similar to `docker ps`.

Question 5

What command pulls the `httpd` image from the Red Hat registry?

Accepted Answer

podman pull registry.access.redhat.com/ubi8/httpd-24

Answer

`podman pull` downloads a container image from a specified registry, using the full image path for Red Hat registries.

RHCE - Red Hat Certified Engineer Practice Test