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Issue description

Example in guide is..

podman volume export http_data --output web_data.tar.gz

The podman volume export does not compress the tar file so the output should read as follows....

podman volume export http_data --output web_data.tar

If you run a 'file' command against the created file it is only a tar archive and not a gzipped archive

There is an apparent difference in behaviour to podman volume import because if you pass a gzip file to the import (as happens in the exercise) it will decompress and extract whereas the export does do the tar-ing but not the compression.

The difference in behaviour should be clearer from the text and the examples/exercise

Steps to reproduce:

Workaround:

Expected result: