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22 lines
857 B
Plaintext
22 lines
857 B
Plaintext
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====== Fetching SSH hostkeys without interaction ======
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---- dataentry snipplet ----
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snipplet_tags: ssh, ssh-keys
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LastUpdate_dt: 2010-07-31
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Contributors: Jan Schampera
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----
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Applies at least to ''openssh''.
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To get the hostkeys for a server, and write them to ''known_hosts''-file (to avoid that yes/no query when the key isn't known), you can do:
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<code>
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ssh-keyscan -t rsa foo foo.example.com 1.2.3.4 >> ~/.ssh/known_host
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</code>
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This example queries the hostkeys for the very same machine, but under 3 different "names" (hostname, FQDN, IP) and redirects the output to the ''known_hosts''-file.
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__**Notes:**__
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* if done blindly, the ''known_host''-file may grow very large. It might be wise to check for key existance first
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* if multiple keys for the same host exist in ''known_hosts'', the first one is taken (which might be an old or wrong one)
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