/usr/sbin/uusched is in uucp 1.07-24.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | #!/bin/sh
# uusched
# Call all systems which have work in a random order
#
# Copyright (C) 1992, 1993 Ian Lance Taylor
#
# Please feel free do whatever you like with this exciting shell
# script.
#
# This is pretty trivial, since all the functionality was moved into
# uucico itself.
#
exec /usr/sbin/uucico -r1 $*
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