This command is Hello World in Docker, and its meaning is similar to other Hello Worlds.
The file system in Docker is based on UFS and uses incremental form to record file modifications. If there are no file modifications in the container, there will naturally be no file increments. However, this does not mean that the container will not occupy space if there are no files to modify it, because in addition to the file system in the container, the container itself also has description files, configuration information, etc. that need to be stored, which will naturally occupy some space.
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This command is Hello World in Docker, and its meaning is similar to other Hello Worlds.
The file system in Docker is based on UFS and uses incremental form to record file modifications. If there are no file modifications in the container, there will naturally be no file increments. However, this does not mean that the container will not occupy space if there are no files to modify it, because in addition to the file system in the container, the container itself also has description files, configuration information, etc. that need to be stored, which will naturally occupy some space.