The release validator caught it: in a container there is no
/etc/network/interfaces at all, and a missing file was being treated as
a read failure, so --check printed nothing and said nothing was wrong
rather than saying there was nothing to do.
A machine with no ifupdown configuration is the ordinary case for a
fresh install, and the answer is simply that this command has no work.
Co-Authored-By: Claude Opus 5 <[email protected]>
