I have been using Debian Jessie. I've used vagrant recently.
I tried to "vagrant up" a box, but after several failing attempts I gave up. However, I noticed that my free space has shrunk notably. I think this happened because the virtual machines I've tried to build, although unsuccessful, somehow managed to occupy that space.
Is there any command on terminal that shows all virtual disks on my linux partition, so I can find the useless ones and delete them?