Validation lab first shared cluster: command not found

Can someone please tell me why this is happening?

vagrant@m103:/$ validate_lab_first_sharded_cluster

validate_lab_first_sharded_cluster: command not found

I think I should get a passing grade for this lab.

Is this file supposed to in the /shared folder or somewhere in the vagrant box? I had to reinstall my vagrant, so I 'm wondering if that could be the problem.

Solution was the first chapter: installing vagrant:

~$ download_validators

For some reason, it didn’t install the validation files when I installed Vagrant the second time.