Hacky bash script to check what version if any of xz is inside your Focker containers.

xz_docker_check.sh

#!/bin/bash

# Get list of all running Docker containers
containers=$(docker ps --format "{{.Names}}")

# Loop through each container
for container in $containers; do
    # Get container image
    image=$(docker inspect --format='{{.Config.Image}}' "$container")
    
    # Execute xz --version inside the container
    version=$(docker exec "$container" xz --version)

    # Write container name, image, and command output to a text file
    echo "Container: $container" >> docker_container_versions.txt
    echo "Image: $image" >> docker_container_versions.txt
    echo "xz Version:" >> docker_container_versions.txt
    echo "$version" >> docker_container_versions.txt
    echo "" >> docker_container_versions.txt
done

echo "Output written to docker_container_versions.txt"