Following the title, and I want to find out every mod-*-fat.jar etc. in OS Debian using username/password, i.e. where are the directories of them when you made this Debian OS?
The folio-backend-auth Vagrant box uses the Docker deployment method, not the “exec” deployment method. Take a look at the deployment descriptors available through the Okapi API (http://localhost:9130/_/discovery). Deployment descriptors are stored in
/etc/folio/deployment-descriptors and are loaded on system startup by the
okapi-deploy systemd service unit.
To see how the system was constructed, take a look at the folio-ansible project on GitHub. We use Vagrant and Ansible to build a FOLIO system on top of a vanilla Debian Jessie box, then package the VM and upload it to Atlas for others to use.