/home/dryad/bagit-3.6/bin/bag
but:
ls -l /home/dryad/bagit-3.6/bin/bag
ls: cannot access /home/dryad/bagit-3.6/bin/bag: No such file or directory
There are releases here (but not 3.6), and I think we can assume backward compatibility.
https://github.com/LibraryOfCongress/bagit-java/releases
dspace.cfg has: bagit.executable = ${default.bagit.executable} settings.xml has: