I am expecting cryptsetup to prompt me for a passphrase, but instead it's just trying and failing to open a key file:
sudo cryptsetup luksFormat test.img cryptsetup-test
WARNING!
========
This will overwrite data on test.img irrevocably.
Are you sure? (Type uppercase yes): YES
Failed to open key file.
You are confusing the syntaxes for
luksFormatandluksOpen.luksFormatdoes not open the device, so doesn't take a device name to map to. So if you try to pass one, it will interpret it as a filename for a key file and try (and probably fail) to open it.Here's an example of
luksFormat:And an example of
luksOpen: