kazulog@sv1:~$ ssh-keygen -t ed25519 -C 'kazulog@client'
Generating public/private ed25519 key pair.
Enter file in which to save the key (/home/kazulog/.ssh/id_ed25519): 
Enter passphrase for "/home/kazulog/.ssh/id_ed25519" (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/kazulog/.ssh/id_ed25519
Your public key has been saved in /home/kazulog/.ssh/id_ed25519.pub
The key fingerprint is:
SHA256:TacHzXz0/ATZw/mJpyrO5/5UTf6VseuQMZNq6LagEF8 kazulog@client
The key's randomart image is:
+--[ED25519 256]--+
|              +o.|
|           + ..B.|
|          o = o.O|
|         o + o.*B|
|   .   ES o .=o+=|
|    o .   ....* +|
|   . . . . o.+ ..|
|    . . +o.o. o  |
|     .  o=*o.. . |
+----[SHA256]-----+
kazulog@sv1:~$ ls -l ~/.ssh/
total 12
-rw------- 1 kazulog kazulog 110 Sep 10 13:30 authorized_keys
-rw------- 1 kazulog kazulog 411 Sep 10 14:49 id_ed25519
-rw-r--r-- 1 kazulog kazulog  96 Sep 10 14:49 id_ed25519.pub