Some tar implementations require -f - in order to read the tar image from stdin. For example, man tar of NetBSD says, quote:
-f archive, --file archive
Filename where the archive is stored. Defaults to
/dev/rst0. If the archive is of the form:
[[user@]host:]file then the archive will be processed using
rmt(8).
Some tar implementations require
-f -
in order to read the tar image from stdin. For example,man tar
of NetBSD says, quote: