keygen

1

ssh-keygen -t ed25519 -C "comment"

authorized_keys

1

cat ~/.ssh/id_ed25519.pub >> ~/.ssh/authorized_keys

ssh config

/etc/ssh/sshd_config

• Port 22
• PermitRootLogin no or PermitRootLogin prohibit-password
• PubkeyAuthentication yes
• PasswordAuthentication no
• AllowUsers user1 user2