fpsync(1) on Linux
The text bf34185540e0, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Synchronize directories in parallel using fpart and rsync.
Flags it lists
-
-O -
-S -
-d -
-f -
-h -
-n -
-o -
-r -
-s -
-t -
-v -
-w