I'm following the steps here (https://github.com/evernym/sovrin-environments/blob/master/vagrant/training/vb-multi-vm/TestSovrinClusterSetup.md) to setup test sovrin network (MacOS, VirtualBox, vagrant). I'm able to successfully ssh to an agent but then it's not able to understand 'sovrin' command.
$ vagrant ssh agent04
vagrant@agent04:~$ sovrin
sovrin: command not found