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SSH (Secure shell) is a protocol for secure communication between computers to execute remote commands, transfer data and tunnel TCP connections.
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SSH - request public key instead of fingerprint?
When initiating a connection by SSH to a server not known in the hosts file, it's common to get a message such as the following:
The authenticity of host '[IP address]' can't be established. …
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How long to re-seed /dev/urandom in a virtual machine?
However, given that you are using a VM for the first time, it seems plausible that one of the first things you might want to do is call on /dev/urandom, e.g. to generate SSH keys. …