Comment 2 for bug 1921526

This is the untouched container image from docker. I ran docker pull ubuntu:focal:

sky@lp1:~$ sudo docker pull ubuntu:focal
[sudo] password for sky:
focal: Pulling from library/ubuntu
Digest: sha256:a15789d24a386e7487a407274b80095c329f89b1f830e8ac6a9323aa61803964
Status: Downloaded newer image for ubuntu:focal
docker.io/library/ubuntu:focal

sky@lp1:~$ sudo docker image inspect ubuntu:focal
[
    {
        "Id": "sha256:8e428cff54c8a8d9759e0b0e13d9224ffe7617abb53a73e01550e32c15827e17",
        "RepoTags": [
            "ubuntu:20.04",
            "ubuntu:focal",
            "ubuntu:latest"
        ],
        "RepoDigests": [
            "ubuntu@sha256:a15789d24a386e7487a407274b80095c329f89b1f830e8ac6a9323aa61803964"
        ],
<trim>

I'll attach a full log for reference. I ran the following to generate the log:

sudo docker run -it ubuntu:focal /bin/bash -c "apt-get update && apt-get install -y python3"

I just tried this using a debian image and I'm having the same issue, so it may be a problem with my docker version or my host system.