By default, the vagrant home is:
- Mac OS X and Linux: ~/.vagrant.d/boxes
- Windows: C:/Users/USERNAME/.vagrant.d/boxes
You can set up the VAGRANT_HOME environment variable to change its location.
It contains the boxes and can become quit large.
Vagrant allows specifying the default provider to use by setting the VAGRANT_DEFAULT_PROVIDER environmental variable.
For example, to get VMware Fusion as default provider on Linux