vagrant upが起動しない

Question

「vagrant up」が起動しなくなりました。
vagrant upを打ち込むと、下記のようなエラーが続きます。

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Checking if box 'puppetlabs/centos-7.2-64-nocm' is up to date...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter 1: nat
==> default: Forwarding ports...
default: 22 (guest) => 2222 (host) (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
default: SSH address: 127.0.0.1:2222
default: SSH username: vagrant
default: SSH auth method: private key
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...

何が原因なのか見当つきません。

ご教示頂けますと幸いです。よろしくお願いします。

Answer 1

公開鍵が消えちゃった？

こちらを参照