$ vagrant init bento/centos-7.2; vagrant up --provider virtualbox
A `Vagrantfile` has been placed in this directory. You are now
ready to `vagrant up` your first virtual environment! Please read
the comments in the Vagrantfile as well as documentation on
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'bento/centos-7.2' could not be found. Attempting to find and install...
default: Box Provider: virtualbox
default: Box Version: >= 0
==> default: Loading metadata for box 'bento/centos-7.2'
==> default: Adding box 'bento/centos-7.2' (v2.3.0) for provider: virtualbox
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.
The requested URL returned error: 500 Internal Server Error
Resolving atlas.hashicorp.com... 52.206.86.0, 52.200.45.173, 52.2.243.35
HTTP request sent, awaiting response... 302 Found
Resolving binstore-test.hashicorp.com... 52.22.42.51, 52.5.248.205, 52.3.11.219, ...
HTTP request sent, awaiting response... 500 Internal Server Error
2016-10-11 20:19:39 ERROR 500: Internal Server Error.