Missing ps command?

[markalanboyd]

I was following along with your Docker tutorial using this image: https://hub.docker.com/r/acantril/containerofcats

Tutorial:
https://learn.cantrill.io/courses/docker-fundamentals/lectures/44151206

When I try to run the ps command, I get these errors:

docker exec -it 0bf660188232 ps -aux
OCI runtime exec failed: exec failed: unable to start container process: exec: "ps": executable file not found in $PATH: unknown

(and when in the shell of the container)

sh-4.4# ps -aux
sh: ps: command not found

Unsure if this is user error, but thought I'd point it out. Thank you!

Docker 4.21.0
Mac Mini M2 Pro
Ventura 13.4.1

[sourcesmith]

The UBI base image does not contain the ps command. To confirm I ran yum install procps-ng and confirmed the install. The ps command then worked.