ssh-keygen -t ed25519

Generating public/private ed25519 key pair.
Enter file in which to save the key (/Users/jsmith/.ssh/id_ed25519): /Users/jsmith/.ssh/id_ed25519_example

Enter passphrase (empty for no passphrase):  xxx
Enter same passphrase again:  xxx

Your identification has been saved in /Users/jsmith/.ssh/id_ed25519_example
Your public key has been saved in /Users/jsmith/.ssh/id_ed25519_example.pub
The key fingerprint is:
SHA256:xxx jsmith@alpha.local
The key's randomart image is:
+--[ED25519 256]--+
xxx
+----[SHA256]-----+