What’s the point of commands like docker run busybox echo hello world?

  docker, question

Each run creates a container that has not been doctored. Does this container take up space? How much space does it take?

This command is “Hello World” in Docker, which has the same meaning as other “Hello World”.

The file system in Docker is based on UFS and records file modifications in increments. If there is no file modification in the container, there will naturally be no file increment. However, it does not mean that the container does not occupy space without file modification, because besides the file system in the container, the container itself also needs to store description files, configuration information, etc., which will naturally occupy some space.