Today is a small SSH fingerprint cheatsheet

The fingerprint

Why

It’s pretty hard to read SSH keys. So fingerprints is a unique shortcut to give a “name” to a public key. It’s mainly used to identify or verify servers you are connecting to.

How

The fingerprint is based on the host’s public key, like /etc/ssh/rsa_key.pub
Here is how to generate one :
ssh-keygen -l -E md5 -f ~/.ssh/id_rsa.pub
You should see

00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff

Note : the fingerprint can be SHA-256 or hexadecimal MD5, depending on the exact command and version of your ssh-keygen

Tip

Copy a ssh key to your clipboard using command line pbcopy < rsa_key.pub

Reference

Stackoverflow fingerprint
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