Use Ed25519 SSH Keys

• Check current available SSH keys.

#!/usr/bin/env bash

for key in ~/.ssh/id_*; do
    ssh-keygen -l -f "${key}"
done | uniq

• Generate the Ed25519 SSH keys.

ssh-keygen \
    -o -a 100 \
    -t ed25519 \
    -f ~/.ssh/id_ed25519 \
    -C "username@hostname"

• Read Risan’s post about Ed25519 for more details.