Paramiko “Unknown Server”

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I experienced the same issue and here’s the solution that worked out for me:

import paramiko

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect('127.0.0.1', username=username, password=password)
stdin, stdout, stderr = client.exec_command('ls -l')

This is to set the policy to use when connecting to a server that doesn’t have a host key in either the system or local HostKeys objects. The default policy is to reject all unknown servers (using RejectPolicy). You may substitute AutoAddPolicy or write your own policy class.

More details at paramiko api doc. Hope this helps.

After that you can save into an other keyfile file for next usage as follows.

ssh.get_host_keys().save('/some/file/path')

You can always load from a file as follows.

ssh.load_host_keys('/some/file/path')

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