i tried to compare performance of shred and dd, because a colleague told, shred -n0 -z would be faster.
the shred manpage tells: If FILE is -, shred standard output But: # shred - | pv >/dev/null shred: - invalid file type 0 B 0:00:00 [ 0 B/s] [<=> i found https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=155175 as "-" works when redirecting to a file, i assume it doesn't work with a pipe because shred needs to seek within the file, which is not possible with a pipe. i think shred -n0 -z could be handled as a special case but it would not be worth the effort. could you perhaps enhance the manpage apropriately, as already suggested in the debian bugreport? regards roland
