$ vagrant up ... ==> centos: Waiting for machine to boot. This may take a few minutes... centos: SSH address: 10.211.55.235:22 centos: SSH username: vagrant centos: SSH auth method: private key centos: Warning: Connection refused. Retrying... centos: centos: Vagrant insecure key detected. Vagrant will automatically replace centos: this with a newly generated keypair for better security. centos: centos: Inserting generated public key within guest... centos: Removing insecure key from the guest if it's present... centos: Key inserted! Disconnecting and reconnecting using new SSH key... centos: Warning: Authentication failure. Retrying... centos: Warning: Authentication failure. Retrying... centos: Warning: Authentication failure. Retrying... centos: Warning: Authentication failure. Retrying... centos: Warning: Authentication failure. Retrying... ...
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參考:ubuntu