technology/linux/general/ssh.md
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@@ -34,6 +34,13 @@ ssh -X user@host
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```
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- on server side `X11Forwarding` must be set to `yes` in '/etc/ssh/sshd_config'
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+## ssh host fingerprint
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+to find the fingerprint of a host
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+```
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+sudo ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key
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+sudo ssh-keygen -l -f /etc/ssh/ssh_host_ecdsa_key
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+```
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+
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## remote host id has changed
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if the fingerprint for the remote host has changed (and you are sure it's not
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a mitm attack) run the following to remove from 'known_hosts'