/usr/lib/fastdnaml/bin/jumble is in fastdnaml 1.2.2-11+b1.
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 | #! /bin/sh
#
# jumble shell script
#
if test $# -gt 1; then echo "Usage: $0 [ seed ]"; exit; fi
read first_line
if test $# -lt 1; then random=$$ ; else random=$1 ; fi
echo "$first_line J"
echo "J $random"
cat -
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